BS 3799-1974 石油工业用钢管件、螺旋管接头和套管焊接规范Specification for steel pipe fittings, screwed and socket-welding
标准简介
BS 3799-1974 石油工业用钢管件、螺旋管接头和套管焊接规范Specification for steel pipe fittings, screwed and socket-welding for the petroleum industry
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