water discharge cock

例句：

1. 1. The water discharge cock isused to control the flow of water inthe toilet.
   排水阀用于控制厕所中水的流动。
2. 2. The engineer had to replace the waterdischarge cock because it was broken.
   工程师不得不更换排水阀，因为它坏了。
3. 3. The waterdischarge cock was located on the wallbehind the sink, making it easy toaccess.
   排水阀位于水槽后面的墙上，很容易到达。