hdgjcxsgbjj
few root of steel pipes 几啊..或more than 2 or more 的用 few,也可以说 a few root 意思是 根 steel pipes就是 钢管的意思 后面加s 是因为more than one 不是单数的
花usahana兔
无缝钢管：seamless steel pipe; seamless steel tube有缝钢管就是焊管，应该是: welded steel pipe/ welded steel tube
伊兰0518
steel pipe钢管, hot drawing pipe热拔钢管, seamless steel tube无缝钢管, seamless hot-drawn pipe热拔无缝钢管, alloy steel pipe合金钢管, alloy steel tube合金钢钢管, perforated steel tube 多孔钢管.
