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Kubota Corp.Hitachi Metals, Ltd.Proterial Ltd.Ryobi Ltd.Kurimoto Ltd.Xinxing Ductile Iron Pipes Co., Ltd.Wuhu Xinxing Ductile Iron Pipes Co., Ltd.Wuhu Xinxing Ductile Iron Pipes Co., Ltd.United States Pipe & Foundry Co. LLCMetso Minerals Industries, Inc.American Cast Iron Pipe Co.Kolbenschmidt Pierburg Shanghai Nonferrous Components Co., LtdHuangshi Xinxing Pipes Co., Ltd.Changzhou Huade Machine Co. Ltd.Gunite EMI Corp.HUA Dong Teksid Automotive Foundry Co., Ltd.Xinxing Ductile Iron Pipes Xinjiang Co., Ltd.Shandong Huifeng Casting Technology Co., Ltd.Teksid SpAAnhui Yingliu Electromechanical Co., Ltd.Weifang 100Tong Casting Co., Ltd.Laizhou Xinzhongyao Machinery Co. Ltd.ASIMCO International Casting Co., Ltd. (Shanxi)ASIMCO Camshaft (Yizheng) Co., Ltd.ASIMCO Camshaft (Yizheng) Co., Ltd.Accuride Corp.Brakes India Pvt Ltd.McWane Cast Iron Pipe Co.Kuo Toong International Co., Ltd.Neenah Foundry Co.
NIPPON STEEL Stainless Steel Corp.Kobe Steel, Ltd.JFE Steel Corp.NKK Corp.NKK Corp.Idemitsu Kosan Co., Ltd.Sumitomo Metal Mining Co. Ltd.JX Nippon Mining & Metals Corp.Mitsui Mining & Smelting Co., Ltd.Baoshan Iron & Steel Co., Ltd.Baoshan Iron & Steel Co., Ltd.NIPPON STEEL Stainless Steel Corp.JSWNippon Light Metal Co., Ltd.Kennametal, Inc.Angang Steel Co., Ltd.Xi'an University of Science & TechnologyTanaka Kikinzoku Kogyo KKTanaka Holdings Co. Ltd.Sankyo Aluminum Industry Co., Ltd.Arconic, Inc.Arconic, Inc.Showa Aluminum Corp.Jinchuan Group Co., Ltd.Global Tungsten & Powders Corp.Armstrong Ceiling Solutions (Australia) Pty Ltd.Wuhan Iron & Steel Co., Ltd.Dowa Electronics Materials Co., Ltd.Sandvik AktiebolagToyo Kohan Co., Ltd.
NIPPON STEEL Stainless Steel Corp.JFE Steel Corp.NKK Corp.NKK Corp.Sumitomo Metal Mining Co. Ltd.Schlumberger Technologies, Inc.JX Nippon Mining & Metals Corp.JX Nippon Mining & Metals Corp.Baoshan Iron & Steel Co., Ltd.Baoshan Iron & Steel Co., Ltd.NIPPON STEEL Stainless Steel Corp.China National Offshore Oil Corp.China National Offshore Oil Corp.Tanaka Kikinzoku Kogyo KKTanaka Holdings Co. Ltd.Sankyo Aluminum Industry Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.Halliburton Co.Jinchuan Group Co., Ltd.Armstrong Ceiling Solutions (Australia) Pty Ltd.Sinopec Oilfield Service Corp.Toyo Kohan Co., Ltd.thyssenkrupp Steel Europe AGUsui Co. Ltd.Senju Metal Industry Co., Ltd.Shanxi Taigang Stainless Steel Co., Ltd.CNOOC Energy Technology & Services Ltd.Shougang Group Co., Ltd.Wuhan Iron & Steel Group Corp.
Kubota Corp.Shin-Etsu Polymer Co., Ltd.Kurimoto Ltd.Xinxing Ductile Iron Pipes Co., Ltd.Wuhu Xinxing Ductile Iron Pipes Co., Ltd.Wuhu Xinxing Ductile Iron Pipes Co., Ltd.Vallourec SAUnited States Pipe & Foundry Co. LLCAdvanced Drainage Systems, Inc.Zhejiang Zhongcai Pipes Science & Technology Co. Ltd.Supreme Industries Ltd.Huangshi Xinxing Pipes Co., Ltd.Mercury Plastics LLCSaint-Gobain Construction Products UK Ltd.The Ford Meter Box Co., Inc.North American Pipe Corp.Kuo Toong International Co., Ltd.Perma-Pipe, Inc.Prinsco, Inc.Walter Coke, Inc.Charlotte Pipe & Foundry Co.Jindal SAW Ltd.Electrosteel Castings Ltd.CANTEX, Inc.HOBAS Engineering + Rohre AGAsahi/America, Inc.USP Holdings, Inc.Northwest Pipe Co.Prime Conduit, Inc.Star Pipe Products Ltd.