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Standard of API 5L SPEC DNV OS-F10 PLS1 PLS2,pipe line steel X46,X52,X56,X60,X65,X70,...
Pipe steel are API 5L X46,API 5L X52,API 5L X56,API 5L X60,API 5L X65,API 5L X70,API...
weldolet threadolet sockolet flangeolet elbowlet nipolet letrolet swepolet MSS SP-9...
Foreign trade department: Dongguan Pulin Metal Co., Ltd. was established in year 2...