单词	pump bob
释义	pump bob noun : a bell crank or similar device for converting rotary into reciprocating motion Word History Etymology pump entry 1
随便看	prewarms prewarn prewarned prewarning prewarns prewarrer prewarrest prewash prewashed prewashes prewashing preweaned preweaning preweighed preweighing preweighs prewelt method prewired prewires prewiring prework preworked preworking preworks prewrap

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