“spade bit”的概念、定义、翻译、参考文献-科学参考

单词	spade bit
释义	spade bit 铲形钻斗
随便看	set a young set-back setback setback building setback buttress setback corner joint setback force set back front axle set-back levee setback line setback pin set-back scale setback type set bar set bit set block set bolt set breakpoint set casing set chisel set clause set clock set coil set collar set command

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