flow back valve

• 单向阀

flow back valve的用法和样例：

例句

1. A drip coffee maker can stop working if the one-way valve gets clogged.
   如果单向阀堵了，电热过滤咖啡机就不能用了。
2. A one-way valve both prevents leakage and provides a consistent product dosage to the ball applicator.
   单向阀既防止泄漏，并提供一致的产品剂量球喷头。