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1. Theplunger lever is used to adjust theheight of the door.
活塞杆杠杆用于调整门的高度。
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2. The engineer used a plunger lever to lift the heavy machine.
工程师使用一个活塞杆杠杆来抬起这台重机器。
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3. The plunger lever wasdesigned to make it easier for people toopen and close the door.
活塞杆杠杆的设计是为了使人们更容易打开和关闭门。