水下舰艇武器推进泵的机械密封装置的工作压力波动、使用频率小，并要求可靠性高。
The mechanical seal utilized in submarine's weapon ejection pump works under fluctuant working pressure and is used in low frequency, and high reliability is indispensable.
本规定所称游艇，是指仅限于游艇所有人自身用于游览观光、休闲娱乐等活动的具备机械推进动力装置的船舶。
The term "yacht" as mentioned in these Provisions only refers to a motor-driven vessel that the owner uses for his own travel, recreation and other activities.
这是一个无人驾驶的双翼飞机，它有着自动钢琴的风箱来为回旋装置提供动力，以及一个收银机的机械装置——通过记录类似螺旋推进器的转子的旋转次数来计算飞行的距离。
It was an unmanned biplane with player-piano bellows to power its gyroscope and a cash-register mechanism that calculated distance flown by counting the rotations of a propeller-like rotor.
船用齿轮传动装置，包括主推进器、离心机、甲板机械如绞盘、起锚机、起重机、旋转装置、泵、升降机及舵托等。
Marine gear transmission device, including the main thruster, centrifuge, deck machinery such as winch, sailed machine, crane, rotating device, pump, elevators and rudder ", etc."
船用齿轮传动装置，包括主推进器、离心机、甲板机械如绞盘、起锚机、起重机、旋转装置、泵、升降机及舵托等。
Marine gear transmission device, including the main thruster, centrifuge, deck machinery such as winch, sailed machine, crane, rotating device, pump, elevators and rudder ", etc."
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