“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	test of location test of normality test of parallelism test of parallelogram test of parallels test of parameters in normal distribution Test of Practical Chinese test of randomness test of significance test of similarity test of special relativity test of statistical hypothesis test of supportability design characteristic for aircraft materiel test of symmetry test of the random number test of the significance of difference test of trend test of validity test of variances testoid test on foundation improvement test on technical performance of ore dressing and smelting testosterone testosterone-estradiol binding globulin Testour Constitutional Movement

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