若焊缝或管子本身不合格，必须更换管子或修理。

If a weld or the pipe itself is faulty, it must be replaced or repaired.

youdao

若焊缝或管子本身不合格，必须更换管子或修理。

If a weld or the pipe itself is faulty, it must be replaced or repaired.

youdao