These fans have a thermostatically controlled viscous clutch. 这类风扇由粘性离合器控制。
The start and stop of the machine are carried out by a multiple-disk clutch and the reciprocation of the ram is achieved by a crank connecting link. 本机床的启动与停止用一多片式离合器控制,滑枕的往复运动通过曲柄连杆机构实现。