jacket drain cock

例句：

1. 1. The jacketdrain cock is used to prevent waterfrom leaking out of the jacket.
   夹克排水阀用于防止水从夹克中泄漏。
2. 2. Jacket drain cocksare essential for maintaining proper drainage in jackets.
   杰克特排水阀对于保持夹克内部良好排水至关重要。
3. 3. The jacketdrain cock was foundto be faulty and neededto be replaced.
   发现夹克排水阀有故障，需要更换。