plunger

名词 plunger:

1. someone who risks losses for the possibility of considerable gains
   同义词：speculator
2. someone who dives (into water)
   同义词：diver
3. hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains
   同义词：plumber's helper
4. mechanical device that has a plunging or thrusting motion
   同义词：piston

plung.er

n.（名词）
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