英语翻译
The steel is not a critical spec' it's merely ERW re-drawn tube 4inch Dia x 16g wall or alternatively 100mm Dia x 1.5 wall
以上是原文,我大致翻译了
钢铁并不是一个关键的规格'这只不过是电阻焊重新割制的钢管:4 inch直径x 16G wall,或者100毫米直径x 1.5 Wall
16G wall ,
看清楚，前面是16克，再一个wall