 7305110000 
纵向埋弧焊接石油、天然气粗钢管
Line pipe of a kind used for oil or gas pipelines ,Longitudinally submerged arc welded , the external diameter of which exceeds 406.4mm |
7305900000
未列名圆形截面粗钢铁管
Other tubes, pipes not elsewhere specified or included, the external diameter of which exceeds 406.4mm |
7305190000
其他石油、天然气粗钢管
Other line pipe of a kind used for oil or gas pipelines , the external diameter of which exceeds 406.4mm |
7305120000
其他纵向焊接石油、天然气粗钢管
Other line pipe of a kind used for oil or gas pipelines , longitudinally welded , the external diameter of which exceeds 406.4mm |
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7305310000
纵向焊接的其他粗钢铁管
Other tubes and pipes , longitudinally welded , the external diameter of which exceeds 406.4mm |
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