• Noun

    Machinery . a pistonlike reciprocating part moving within the cylinder of a pump or hydraulic device.
    Automotive . a pistonlike part in the valve of a pneumatic tire.
    Also called force cup , plumber's friend, plumber's helper. a device consisting of a handle with a rubber suction cup at one end, used as a force pump to free clogged drains and toilet traps.
    a person or thing that plunges.
    a reckless bettor or speculator.

    tác giả


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