rammer
撞進的人,撞槌,裝藥棒
Ram·mer n. One who, or that which, rams or drives. Specifically: (a) An instrument for driving anything with force; as, a rammer for driving stones or piles, or for beating the earth to more solidity. (b) A rod for forcing down the charge of a gun; a ramrod. (c) Founding An implement for pounding the sand of a mold to render it compact.
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rammer
n : a tool for driving something with force