pipe drain

基本解释

If they could do it, then they could escape through the drain pipe easily.
如果他们能够挖到下水道，那么他们就可以轻松地通过下水道逃走了。
A physical air gap must be maintained between the discharge pipe and the drain or sump.
必须在排放管道和排水沟或污水坑之间配置一个硬件气隙。
Currently accepted use most is the PPR pipe, plastic pipes, such as aluminum composite pipe drain is PVC pipe.
目前公认使用最多的供水管是PPR管、塑铝复合管等，排水管是PVC管。

Whereas the channel is like a pipe between the source and the drain—it simply lets electrons flow through when the transistor is on—the island is more like a gap between two turnstiles.
ECONOMIST: The transistor’s heir
The second suggests that a rod-like plug can block the hole by slipping across it sideways and stopping large ions from passing, rather like a drain cover stops leaves from entering the mouth of a pipe.
ECONOMIST: Synthetic biology: Expanded vocabulary The