“percussion bit”的概念、定义、翻译、参考文献-科学参考

单词	percussion bit
释义	percussion bit [pǝr`kǝsh·ǝn ´bit] ^{MECHANICAL ENGINEERING} A rock-drilling tool with chisellike cutting edges, which when driven by impacts against a rock surface drills a hole by a chipping action.
随便看	Neotropical zoogeographic region neotype neounitarian theory of hematopoiesis neovolcanic nep Nepenthaceae neper nephanalysis nephcurve nepheline nepheline basalt nepheline monzonite nepheline phonolite nepheline syenite nephelinite nephelite nepheloid zone nephelometer nephelometry nepheloscope nephology nephometer nephoscope nephrectomy nephric tubule

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。