Table of Contents 1 Study Coverage 1.1 Steel Ball Product 1.2 Key Market Segments in This Study 1.3 Key Manufacturers Covered 1.4 Market by Type 1.4.1 Global Steel Ball Market Size Growth Rate by Type 1.4.2 Stainless Steel Ball 1.4.3 Bearing Steel Ball 1.4.4 Carbon Steel Ball 1.5 Market by Application 1.5.1 Global Steel Ball Market Size Growth Rate by Application 1.5.2 Industrial Equipment 1.5.3 Automotive Industry 1.5.4 Railway & Aerospace 1.5.5 Others 1.6 Study Objectives 1.7 Years Considered 2 Executive Summary 2.1 Global Steel Ball Market Size 2.1.1 Global Steel Ball Revenue 2014-2025 2.1.2 Global Steel Ball Production 2014-2025 2.2 Steel Ball Growth Rate (CAGR) 2019-2025 2.3 Analysis of Competitive Landscape 2.3.1 Manufacturers Market Concentration Ratio (CR5 and HHI) 2.3.2 Key Steel Ball Manufacturers 2.3.2.1 Steel Ball Manufacturing Base Distribution, Headquarters 2.3.2.2 Manufacturers Steel Ball Product Offered 2.3.2.3 Date of Manufacturers Enter into Steel Ball Market 2.4 Key Trends for Steel Ball Markets & Products 3 Market Size by Manufacturers 3.1 Steel Ball Production by Manufacturers 3.1.1 Steel Ball Production by Manufacturers 3.1.2 Steel Ball Production Market Share by Manufacturers 3.2 Steel Ball Revenue by Manufacturers 3.2.1 Steel Ball Revenue by Manufacturers (2014-2019) 3.2.2 Steel Ball Revenue Share by Manufacturers (2014-2019) 3.3 Steel Ball Price by Manufacturers 3.4 Mergers & Acquisitions, Expansion Plans 4 Steel Ball Production by Regions 4.1 Global Steel Ball Production by Regions 4.1.1 Global Steel Ball Production Market Share by Regions 4.1.2 Global Steel Ball Revenue Market Share by Regions 4.2 United States 4.2.1 United States Steel Ball Production 4.2.2 United States Steel Ball Revenue 4.2.3 Key Players in United States 4.2.4 United States Steel Ball Import & Export 4.3 Europe 4.3.1 Europe Steel Ball Production 4.3.2 Europe Steel Ball Revenue 4.3.3 Key Players in Europe 4.3.4 Europe Steel Ball Import & Export 4.4 China 4.4.1 China Steel Ball Production 4.4.2 China Steel Ball Revenue 4.4.3 Key Players in China 4.4.4 China Steel Ball Import & Export 4.5 Japan 4.5.1 Japan Steel Ball Production 4.5.2 Japan Steel Ball Revenue 4.5.3 Key Players in Japan 4.5.4 Japan Steel Ball Import & Export 4.6 Other Regions 4.6.1 South Korea 4.6.2 India 4.6.3 Southeast Asia 5 Steel Ball Consumption by Regions 5.1 Global Steel Ball Consumption by Regions 5.1.1 Global Steel Ball Consumption by Regions 5.1.2 Global Steel Ball Consumption Market Share by Regions 5.2 North America 5.2.1 North America Steel Ball Consumption by Application 5.2.2 North America Steel Ball Consumption by Countries 5.2.3 United States 5.2.4 Canada 5.2.5 Mexico 5.3 Europe 5.3.1 Europe Steel Ball Consumption by Application 5.3.2 Europe Steel Ball Consumption by Countries 5.3.3 Germany 5.3.4 France 5.3.5 UK 5.3.6 Italy 5.3.7 Russia 5.4 Asia Pacific 5.4.1 Asia Pacific Steel Ball Consumption by Application 5.4.2 Asia Pacific Steel Ball Consumption by Countries 5.4.3 China 5.4.4 Japan 5.4.5 South Korea 5.4.6 India 5.4.7 Australia 5.4.8 Indonesia 5.4.9 Thailand 5.4.10 Malaysia 5.4.11 Philippines 5.4.12 Vietnam 5.5 Central & South America 5.5.1 Central & South America Steel Ball Consumption by Application 5.5.2 Central & South America Steel Ball Consumption by Country 5.5.3 Brazil 5.6 Middle East and Africa 5.6.1 Middle East and Africa Steel Ball Consumption by Application 5.6.2 Middle East and Africa Steel Ball Consumption by Countries 5.6.3 GCC Countries 5.6.4 Egypt 5.6.5 South Africa 6 Market Size by Type 6.1 Global Steel Ball Production by Type 6.2 Global Steel Ball Revenue by Type 6.3 Steel Ball Price by Type 7 Market Size by Application 7.1 Overview 7.2 Global Steel Ball Breakdown Dada by Application 7.2.1 Global Steel Ball Consumption by Application 7.2.2 Global Steel Ball Consumption Market Share by Application (2014-2019) 8 Manufacturers Profiles 8.1 Tsubaki Nakashima 8.1.1 Tsubaki Nakashima Company Details 8.1.2 Company Overview 8.1.3 Tsubaki Nakashima Steel Ball Production Revenue and Gross Margin (2014-2019) 8.1.4 Tsubaki Nakashima Steel Ball Product Description 8.1.5 Tsubaki Nakashima Recent Development 8.2 Amatsuji Steel Ball Mfg. Co., Ltd. 8.2.1 Amatsuji Steel Ball Mfg. Co., Ltd. Company Details 8.2.2 Company Overview 8.2.3 Amatsuji Steel Ball Mfg. Co., Ltd. Steel Ball Production Revenue and Gross Margin (2014-2019) 8.2.4 Amatsuji Steel Ball Mfg. Co., Ltd. Steel Ball Product Description 8.2.5 Amatsuji Steel Ball Mfg. Co., Ltd. Recent Development 8.3 Jiangsu LiXing General Steel Ball Co.,Ltd. 8.3.1 Jiangsu LiXing General Steel Ball Co.,Ltd. Company Details 8.3.2 Company Overview 8.3.3 Jiangsu LiXing General Steel Ball Co.,Ltd. Steel Ball Production Revenue and Gross Margin (2014-2019) 8.3.4 Jiangsu LiXing General Steel Ball Co.,Ltd. Steel Ball Product Description 8.3.5 Jiangsu LiXing General Steel Ball Co.,Ltd. Recent Development 8.4 Dong'e Shandong steel ball Group Co., Ltd. 8.4.1 Dong'e Shandong steel ball Group Co., Ltd. Company Details 8.4.2 Company Overview 8.4.3 Dong'e Shandong steel ball Group Co., Ltd. Steel Ball Production Revenue and Gross Margin (2014-2019) 8.4.4 Dong'e Shandong steel ball Group Co., Ltd. Steel Ball Product Description 8.4.5 Dong'e Shandong steel ball Group Co., Ltd. Recent Development 8.5 Sunan Weijie Steel Ball CO., Ltd. 8.5.1 Sunan Weijie Steel Ball CO., Ltd. Company Details 8.5.2 Company Overview 8.5.3 Sunan Weijie Steel Ball CO., Ltd. Steel Ball Production Revenue and Gross Margin (2014-2019) 8.5.4 Sunan Weijie Steel Ball CO., Ltd. Steel Ball Product Description 8.5.5 Sunan Weijie Steel Ball CO., Ltd. Recent Development 9 Production Forecasts 9.1 Steel Ball Production and Revenue Forecast 9.1.1 Global Steel Ball Production Forecast 2019-2025 9.1.2 Global Steel Ball Revenue Forecast 2019-2025 9.2 Steel Ball Production and Revenue Forecast by Regions 9.2.1 Global Steel Ball Revenue Forecast by Regions 9.2.2 Global Steel Ball Production Forecast by Regions 9.3 Steel Ball Key Producers Forecast 9.3.1 United States 9.3.2 Europe 9.3.3 China 9.3.4 Japan 9.4 Forecast by Type 9.4.1 Global Steel Ball Production Forecast by Type 9.4.2 Global Steel Ball Revenue Forecast by Type 10 Consumption Forecast 10.1 Steel Ball Consumption Forecast by Application 10.2 Steel Ball Consumption Forecast by Regions 10.3 North America Market Consumption Forecast 10.3.1 North America Steel Ball Consumption Forecast by Regions 2019-2025 10.3.2 United States 10.3.3 Canada 10.3.4 Mexico 10.4 Europe Market Consumption Forecast 10.4.1 Europe Steel Ball Consumption Forecast by Regions 2019-2025 10.4.2 Germany 10.4.3 France 10.4.4 UK 10.4.5 Italy 10.4.6 Russia 10.5 Asia Pacific Market Consumption Forecast 10.5.1 Asia Pacific Steel Ball Consumption Forecast by Regions 2019-2025 10.5.2 China 10.5.3 Japan 10.5.4 South Korea 10.5.5 India 10.5.6 Australia 10.5.7 Indonesia 10.5.8 Thailand 10.5.9 Malaysia 10.5.10 Philippines 10.5.11 Vietnam 10.6 Central & South America Market Consumption Forecast 10.6.1 Central & South America Steel Ball Consumption Forecast by Regions 2019-2025 10.6.2 Brazil 10.7 Middle East and Africa Market Consumption Forecast 10.7.1 Middle East and Africa Steel Ball Consumption Forecast by Regions 2019-2025 10.7.2 GCC Countries 10.7.3 Egypt 10.7.4 South Africa 11 Value Chain and Sales Channels Analysis 11.1 Value Chain Analysis 11.2 Sales Channels Analysis 11.2.1 Steel Ball Sales Channels 11.2.2 Steel Ball Distributors 11.3 Steel Ball Customers 12 Market Opportunities & Challenges, Risks and Influences Factors Analysis 12.1 Market Opportunities and Drivers 12.2 Market Challenges 12.3 Market Risks/Restraints 13 Key Findings in the Global Steel Ball Study 14 Appendix 14.1 Research Methodology 14.1.1 Methodology/Research Approach 14.1.1.1 Research Programs/Design 14.1.1.2 Market Size Estimation 14.1.1.3 Market Breakdown and Data Triangulation 14.1.2 Data Source 14.1.2.1 Secondary Sources 14.1.2.2 Primary Sources 14.2 Author Details 14.3 Disclaimer

List of Tables and Figures Figure Steel Ball Product Picture Table Steel Ball Key Market Segments in This Study Table Key Manufacturers Steel Ball Covered in This Study Table Global Steel Ball Market Size Growth Rate by Type 2019-2025 (K MT) & (Million US$) Figure Global Steel Ball Production Market Share 2014-2025 Figure Stainless Steel Ball Product Picture Table Major Manufacturers of Stainless Steel Ball Figure Bearing Steel Ball Product Picture Table Major Manufacturers of Bearing Steel Ball Figure Carbon Steel Ball Product Picture Table Major Manufacturers of Carbon Steel Ball Table Global Steel Ball Market Size Growth Rate by Application 2019-2025 (K MT) Figure Industrial Equipment Figure Automotive Industry Figure Railway & Aerospace Figure Others Figure Steel Ball Report Years Considered Figure Global Steel Ball Revenue 2014-2025 (Million US$) Figure Global Steel Ball Production 2014-2025 (K MT) Table Global Steel Ball Market Size Growth Rate by Regions 2019-2025(K MT) & (Million US$) Table Global Manufacturers Market Concentration Ratio (CR5 and HHI) Table Steel Ball Manufacturing Base Distribution and Headquarters Table Manufacturers Steel Ball Product Offered Table Date of Manufacturers Enter into Steel Ball Market Table Global Steel Ball Production by Manufacturers (2014-2019) (K MT) Table Global Steel Ball Production Share by Manufacturers (2014-2019) Figure Global Steel Ball Production Share by Manufacturers in 2018 Table Steel Ball Revenue by Manufacturers (2014-2019) (Million US$) Table Steel Ball Revenue Share by Manufacturers (2014-2019) Table Steel Ball Price by Manufacturers 2014-2019 (USD/MT) Table Mergers & Acquisitions, Expansion Plans Table Global Steel Ball Production by Regions 2014-2019 (K MT) Table Global Steel Ball Production Market Share by Regions 2014-2019 Figure Global Steel Ball Production Market Share by Regions 2014-2019 Figure Global Steel Ball Production Market Share by Regions in 2018 Table Global Steel Ball Revenue by Regions 2014-2019 (Million US$) Table Global Steel Ball Revenue Market Share by Regions 2014-2019 Figure Global Steel Ball Revenue Market Share by Regions 2014-2019 Figure Global Steel Ball Revenue Market Share by Regions in 2018 Figure United States Steel Ball Production and Growth Rate 2014-2019 (K MT) Figure United States Steel Ball Revenue and Growth Rate 2014-2019 (Million US$) Table United States Steel Ball Import & Export Figure Europe Steel Ball Production and Growth Rate 2014-2019 (K MT) Figure Europe Steel Ball Revenue and Growth Rate 2014-2019 (Million US$) Table Europe Steel Ball Import & Export Figure China Steel Ball Production and Growth Rate 2014-2019 (K MT) Figure China Steel Ball Revenue and Growth Rate 2014-2019 (Million US$) Table China Steel Ball Import & Export Figure Japan Steel Ball Production and Growth Rate 2014-2019 (K MT) Figure Japan Steel Ball Revenue and Growth Rate 2014-2019 (Million US$) Table Japan Steel Ball Import & Export Table Global Steel Ball Consumption by Regions 2014-2019 (K MT) Table Global Steel Ball Consumption Market Share by Regions 2014-2019 Figure Global Steel Ball Consumption Market Share by Regions 2014-2019 Figure Global Steel Ball Consumption Market Share by Regions in 2018 Figure North America Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Table North America Steel Ball Consumption by Application (2014-2019) (K MT) Figure 2018 North America Steel Ball Consumption Market Share by Application Table North America Steel Ball Consumption by Countries (2014-2019) (K MT) Figure 2018 North America Steel Ball Consumption Market Share by Countries Figure United States Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Canada Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Mexico Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Europe Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Table Europe Steel Ball Consumption by Application (2014-2019) (K MT) Figure 2018 Europe Steel Ball Consumption Market Share by Application Table Europe Steel Ball Consumption by Countries (2014-2019) (K MT) Figure 2018 Europe Steel Ball Consumption Market Share by Countries Figure Germany Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure France Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure UK Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Italy Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Russia Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Asia Pacific Steel Ball Consumption and Growth Rate (K MT) Table Asia Pacific Steel Ball Consumption by Application (2014-2019) (K MT) Table Asia Pacific Steel Ball Consumption Market Share by Application (2014-2019) (K MT) Table Asia Pacific Steel Ball Consumption by Countries (2014-2019) (K MT) Table Asia Pacific Steel Ball Consumption Market Share by Countries (2014-2019) (K MT) Figure China Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Japan Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Korea Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure India Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Australia Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Indonesia Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Thailand Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Malaysia Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Philippines Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Vietnam Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Central & South America Steel Ball Consumption and Growth Rate (K MT) Table Central & South America Steel Ball Consumption by Application (2014-2019) (K MT) Figure 2018 Central & South America Steel Ball Consumption Market Share by Application Table Central & South America Steel Ball Consumption by Countries (2014-2019) (K MT) Figure Central & South America Steel Ball Consumption Market Share by Countries Figure Brazil Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Middle East and Africa Steel Ball Consumption and Growth Rate (K MT) Table Middle East and Africa Steel Ball Consumption by Application (2014-2019) (K MT) Figure 2018 Middle East and Africa Steel Ball Consumption Market Share by Application Table Middle East and Africa Steel Ball Consumption by Countries (2014-2019) (K MT) Figure Middle East and Africa Steel Ball Consumption Market Share by Countries Figure GCC Countries Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure Egypt Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Figure South Africa Steel Ball Consumption and Growth Rate (2014-2019) (K MT) Table Global Steel Ball Production by Type (2014-2019) (K MT) Table Global Steel Ball Production Share by Type (2014-2019) Figure Global Steel Ball Production Market Share by Type (2014-2019) Figure Global Steel Ball Production Market Share by Type in 2018 Table Global Steel Ball Revenue by Type (2014-2019) (Million US$) Table Global Steel Ball Revenue Share by Type (2014-2019) Figure Global Steel Ball Revenue Market Share by Type (2014-2019) Figure Global Steel Ball Revenue Market Share by Type in 2018 Table Steel Ball Price by Type 2014-2019 (USD/MT) Table Global Steel Ball Consumption by Application (2014-2019) (K MT) Table Global Steel Ball Consumption by Application (2014-2019) (K MT) Table Global Steel Ball Consumption Share by Application (2014-2019) Figure Global Steel Ball Consumption Market Share by Application (2014-2019) Figure Global Steel Ball Value (Consumption) Market Share by Application (2014-2019) Table Tsubaki Nakashima Company Details Table Tsubaki Nakashima Steel Ball Production (K MT), Revenue (Million US$), Price (USD/MT) and Gross Margin (2014-2019) Table Tsubaki Nakashima Steel Ball Recent Development Table Amatsuji Steel Ball Mfg. Co., Ltd. Company Details Table Amatsuji Steel Ball Mfg. Co., Ltd. Steel Ball Production (K MT), Revenue (Million US$), Price (USD/MT) and Gross Margin (2014-2019) Table Amatsuji Steel Ball Mfg. Co., Ltd. Steel Ball Recent Development Table Jiangsu LiXing General Steel Ball Co.,Ltd. Company Details Table Jiangsu LiXing General Steel Ball Co.,Ltd. Steel Ball Production (K MT), Revenue (Million US$), Price (USD/MT) and Gross Margin (2014-2019) Table Jiangsu LiXing General Steel Ball Co.,Ltd. Steel Ball Recent Development Table Dong'e Shandong steel ball Group Co., Ltd. Company Details Table Dong'e Shandong steel ball Group Co., Ltd. Steel Ball Production (K MT), Revenue (Million US$), Price (USD/MT) and Gross Margin (2014-2019) Table Dong'e Shandong steel ball Group Co., Ltd. Steel Ball Recent Development Table Sunan Weijie Steel Ball CO., Ltd. Company Details Table Sunan Weijie Steel Ball CO., Ltd. Steel Ball Production (K MT), Revenue (Million US$), Price (USD/MT) and Gross Margin (2014-2019) Table Sunan Weijie Steel Ball CO., Ltd. Steel Ball Recent Development Figure Global Steel Ball Production Forecast 2019-2025 (K MT) Figure Global Steel Ball Revenue Forecast 2019-2025 (Million US$) Table Global Steel Ball Revenue Forecast 2019-2025 (Million US$) Table Global Steel Ball Revenue Forecast by Regions 2019-2025 (Million US$) Figure Global Steel Ball Revenue Forecast by Regions 2019-2025 (Million US$) Figure Global Steel Ball Revenue Market Share Forecast by Regions 2019-2025 Table Global Steel Ball Production Forecast by Regions 2019-2025 (K MT) Figure Global Steel Ball Production Forecast by Regions 2019-2025 (K MT) Figure Global Steel Ball Production Market Share Forecast by Regions 2019-2025 Figure United States Steel Ball Production Forecast 2019-2025 (K MT) Figure United States Steel Ball Revenue Forecast 2019-2025 (Million US$) Figure Europe Steel Ball Production Forecast 2019-2025 (K MT) Figure Europe Steel Ball Revenue Forecast 2019-2025 (Million US$) Figure China Steel Ball Production Forecast 2019-2025 (K MT) Figure China Steel Ball Revenue Forecast 2019-2025 (Million US$) Figure Japan Steel Ball Production Forecast 2019-2025 (K MT) Figure Japan Steel Ball Revenue Forecast 2019-2025 (Million US$) Table Global Steel Ball Production Forecast by Type 2019-2025 (K MT) Figure Global Steel Ball Production Forecast by Type 2019-2025 (K MT) Figure Global Steel Ball Production Market Share Forecast by Type 2019-2025 Table Global Steel Ball Revenue Forecast by Type 2019-2025 (Million US$) Figure Global Steel Ball Revenue Forecast by Type 2019-2025 (Million US$) Figure Global Steel Ball Revenue Market Share Forecast by Type 2019-2025 Table Global Steel Ball Consumption Forecast by Application 2019-2025 (K MT) Figure Global Steel Ball Consumption Forecast by Application 2019-2025 (K MT) Figure Global Steel Ball Consumption Market Share Forecast by Application 2019-2025 Table Global Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure Global Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure Global Steel Ball Consumption Market Share Forecast by Regions 2019-2025 Table North America Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure United States Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Canada Steel Ball Consumption Forecast 2019-2025 (K MT) Figure MexicoSteel Ball Consumption Forecast 2019-2025 (K MT) Table Europe Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure Germany Steel Ball Consumption Forecast 2019-2025 (K MT) Figure France Steel Ball Consumption Forecast 2019-2025 (K MT) Figure UK Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Italy Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Russia Steel Ball Consumption Forecast 2019-2025 (K MT) Table Asia Pacific Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure China Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Japan Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Korea Steel Ball Consumption Forecast 2019-2025 (K MT) Figure India Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Australia Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Indonesia Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Thailand Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Malaysia Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Philippines Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Vietnam Steel Ball Consumption Forecast 2019-2025 (K MT) Table Central & South America Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure Brazil Steel Ball Consumption Forecast 2019-2025 (K MT) Table Middle East and Africa Steel Ball Consumption Forecast by Regions 2019-2025 (K MT) Figure Middle East and Africa Steel Ball Consumption Forecast 2019-2025 (K MT) Figure GCC Countries Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Egypt Steel Ball Consumption Forecast 2019-2025 (K MT) Figure South Africa Steel Ball Consumption Forecast 2019-2025 (K MT) Figure Steel Ball Value Chain Table Steel Ball Distributors List Table Steel Ball Customers List Table Research Programs/Design for This Report Figure Bottom-up and Top-down Approaches for This Report Figure Data Triangulation Table Key Data Information from Secondary Sources Table Key Data Information from Primary Sources

Tsubaki Nakashima Amatsuji Steel Ball Mfg. Co., Ltd. Jiangsu LiXing General Steel Ball Co.,Ltd. Dong'e Shandong steel ball Group Co., Ltd. Sunan Weijie Steel Ball CO., Ltd.