drain valve

• 排水阀,泄水阀

drain valve的用法和样例：

例句

1. Leave the drain valve of the holding tank opened.
   让贮槽的排水阀打开。
2. All vents and drain valves which are to remain in service during the test must be leak free.
   测试过程中一直使用的所有放空阀和排水阀均必须不带任何泄漏。