单词：permanent speed
permanent speed的用法和样例：
例句
- It enables the rotor with constant speed for maintaining steady output voltage.它使转子能以恒定速度转动，保持输出电压稳定。
- He also developed a centrifuge governor to hold a steam engine at a constant speed.他还开发了离心总督举行蒸汽机以恒定速度。
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