Traveling wave ultrasonic motor is a new type of actuator driven by friction.
行波超声马达是一种靠摩擦力直接驱动的新型驱动器。
Magnetostrictive actuator is a new type of actuator, and its designing is particular.
超磁致伸缩驱动器是一种新型驱动器，其设计理论和方法具有特殊性。
The major disadvantage of this type of actuator is air consumption, particularly when applied to large valves.
这种类型驱动装置的主要缺点是气源消耗，特别是使用在大通径阀门。
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