Spiral welded pipe is a strip coil as raw material, often warm extrusion molding, to automatically double-wire submerged arc welding process double-sided spiral welded pipe joints.
螺旋焊管是以带钢卷板为原材料，经常温挤压成型，以自动双丝双面埋弧焊工艺焊接而成的螺旋缝钢管。
This is because the teapot's material is by default set to Double-sided.
这是因为茶壶的材质被默认成了双面。
This is because the teapot's material is by default set to Double-sided.
这是因为茶壶的材质被默认成了双面。
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