“drag bit”的概念、定义、翻译、参考文献-科学参考

单词	drag bit
释义	drag bit Encyclopedia 工学钻井装备释 drag bit刮刀钻头以刮削方式破碎井底岩石的、带有刮刀片的钻头。
随便看	verification and validation verification and validation, V&V verification by sampling verification device for torque wrenches verification device of Oxygen detector verification of a statement verification of computational fluid dynamics software verification of establishment and staffing Verification of Gods verification of measuring instrument verification of production capacity in underground mine verification of spectrophotometer verification of statistical hypothesis verification of the hydrological measurement instrument verification of traces verification on geologic hazard Verification parameters of laser energy meter verification problem verification system of construction project fire prevention design verification technology of nuclear arms control verification, validation and accreditation verification & validation of reactor computation software verified protection verifier verifying apparatus technology

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