“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	piedmont interstream flat piedmontite piedmont lake piedmont plain piedmont plateau piedmont scarp piedmont slope piedmont stairway piedmont step piedmont treppe pi electron piemontite pier piercement piercement dome Pierce oscillator Pierce's disease piercing piercing fold piercing gripper piercing point pier foundation pierhead line Pieridae Piesmatidae

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