“plumb bob”的概念、定义、翻译、参考文献-科学参考

单词	plumb bob
释义	plumb bob [`plǝm ´bäb] ^ENGINEERING A weight suspended on a string to indicate the direction of the vertical.
随便看	ptyalin Ptychodactiaria Ptychomniaceae ptychotis oil Ptyctodontida ptygma ptygmatic fold p-type conductivity p-type crystal rectifier p+-type semiconductor p-type semiconductor p-type silicon Pu puberty puberulic acid pubic arch pubic crest pubic height pubic symphysis pubis public address system public area public communications service public correspondence public data

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