另一种弯管没有塞子，也更常见，这样S形弯管就得卸掉。

The second type of trap does not have a plug and is more common. The S-shaped pipe, the trap, must be removed.

youdao

另一种弯管没有塞子，也更常见，这样S形弯管就得卸掉。

The second type of trap does not have a plug and is more common. The S-shaped pipe, the trap, must be removed.

youdao