Actuator - Wikipedia An actuator is a component of a machine that produces force, torque, or displacement, when an electrical, pneumatic or hydraulic input is supplied to it in a system (called an actuating system)
ACTUATOR中文 (简体)翻译：剑桥词典 - Cambridge Dictionary A broken actuator can lock a part into position The company makes actuators, devices that fit on to the valves along pipelines, controlling the opening and closing of the valve