单向阀

cone-way valve的用法和样例：

例句

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。
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。

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