dashpot check valve的用法和樣例：
例句
- A drip coffee maker can stop working if the one-way valve gets clogged.
如果單向閥堵了，電熱過濾咖啡機就不能用了。 - The check valve avoids refluence of air in pipe- lines and consequent pressure loss in which compressed air is intended to flow in one direction only.
單向閥能防止管路中的空氣迴流，以及隨之而來的因壓縮空氣朝這一方向流動而產生的壓力損失。
