“rock bit”的概念、定义、翻译、参考文献-科学参考

单词	rock bit
释义	rock bit [`räk ´bit] ^ENGINEERING Any one of many different types of roller bits used on rotary-type drills for drilling large-size holes in soft to medium-hard rocks.
随便看	semicircular canal semicircular deviation semiclosed-cycle gas turbine semicoma semicompreg semiconducting compound semiconducting crystal semiconductive loading tube semiconductor semiconductor detector semiconductor device semiconductor diode semiconductor-diode parametric amplifier semiconductor disk semiconductor doping semiconductor heterostructure semiconductor intrinsic properties semiconductor junction semiconductor laser semiconductor memory semiconductor rectifier semiconductor storage semiconductor thermocouple semiconductor trap semiconjugate axis

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