It has changed the traditional design order in checking the diameter of bit.

它改变了牙轮钻头直径校核的传统设计顺序。

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According to the relation between the temperature and the ratio of the diameter of the defrosting zone to that of the drilling bit, the volume of washing fluid is optimized.

依据不同冲洗液温度时融化区直径与钻头直径比和冲洗液用量的关系，讨论了冲洗液用量的优化。

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The axial regulator is adjusted to adjust the diameter of the tool bit.

调整轴向调整装置，就可以调整刀头的直径。

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Inside the riser pipe is a space about half a meter in diameter, large enough to hold the spinning drill pipe and bit and to allow the return flow of drilling fluid.

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