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7YRSTianjin Youfa International Trade Co., Ltd.
UL/FM standard ASTM A53 A106 ERW Galvanized Steel Tube
7YRSTianjin Youfa International Trade Co., Ltd.
Gas Pipe/Oil Pipe ASTM A106/API 5L Carbon Seamless Steel Pipe
7YRSTianjin Youfa International Trade Co., Ltd.
YOUFA factory Standard Spiral Steel tube Piling Pipes for Bridge / Port constructions
8YRSTianjin Youfa International Trade Co Ltd
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