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ASME B16.5 ASTM A403 WP304 Socket Welding Flange CL900 SCH80
8YRSZhejiang Footo Pipe Fitting Manufacturing Co., Ltd.
UL 94 Flammability Tester For Testing Plastic Material
7YRSGuangdong Haiyouda Intelligent Technology Co., Ltd.
UL/FM standard ASTM A53 A106 ERW Galvanized round Steel Tube
7YRSTianjin Youfa International Trade Co., Ltd.
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