Both ventilation systems can be operated or supported mechanically if desired.
如果需要的话，两者都可以通过机械控制或支持。
ACTUATOR, A mechanical device operated electrically, hydraulically, pneumatically or mechanically for transmitting motion between components.
作动筒，由电，液压，气源或机械驱动的机械装置，用于传送部件之间的运动。
Power shifting device, mechanically actuated power and foot operated power make the engine more agile.
设置装备摆设动力转换装配，具有灵活和脚踏两种动力，操作灵巧。
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