Servovalve
[电] 伺服阀
🗣️ 情景例句
The price includes mailing costs.
这价格包括邮寄费用。
The more a man knows, the less he knows he knows.
懂得越多，就越知道自己懂得不多。
and at the most critical juncture we took turns in watching that point.
在最紧急的时刻，我们轮流监视那段河流的险情。