gas-tight motor 气密式电动机
water tight motor 防水式电动机
air tight type motor 气密式电动机
water-tight type motor 防水式电动机
dust-tight type motor 防尘式电念头 ; 防尘式电动机
Simply slip the trainer on and pressure sensors will tell the 'smart shoe' when your foot is in position, triggering a tiny motor in the heel that pulls the LACES tight.
只需滑动控制器，脚穿进去时，压力传感器就会告知“智能鞋”，触发鞋跟的小发动机，将鞋带系紧。
The motor case is a steel cylinder closed tight at one end. the other end is the open throat and nozzle.
发动机壳体为一个其一端为密封的钢铸圆柱缸体，另一端则为敞口的喉道及喷管。
Attached to a water valve next to the tight two-way rotating motor.
节水阀旁紧连着一个双向旋转电机。
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