API 5L GRA/GRB ERW STEEL PIPE Carbon Welded Steel Pipe 1.Technical Data Standard ANSI,ASTM A53 ,API 5L , API 5CT, DIN,GB.JIS Material Gr A,B,A53 Gr B,ASTM A179,A106GrB,ASTM A53GrB,St42,St45,A179,A135...
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