- One who plunges or dives.跳水者，潜水者
- A device consisting of a rubber suction cup attached to the end of a stick, used to clean out clogged drains and pipes. Also called plumber's helper 手压皮碗泵：由固定在一根棍子末端的橡皮抽吸杯构成的一种装置，用来疏通堵塞的下水道或管道 也作 plumber's helper
- A machine part, such as a piston, that operates with a thrusting or plunging movement.撞针杆：一种带有猛烈的冲或扎运动来运作的机器部件，如撞针