单词：booster relay
booster relay的用法和样例：
例句
- A booster relay controls a pinch valve by supplying air pressure to the valve body.升压继电器通过控制输送到阀体的气量来实现对夹管阀的控制。
- Booster relays can be used instead of positioners in many different kinds of control applications.升压继电器可以用来替代其他不同种类控制装置中的定位器。
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