钻头转速对钻头扭矩几乎无影响。

Bit speed is almost no influence on the torque.

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SRT采用创新性技术，通过控制泥浆流速来调节钻头转速。

The SRT USES an innovative technique to control bit speed through modulated mud flow.

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手动钻孔的钻头转速 慢，无温升，可以避免烧糊人体组织的情况发生。

The drill head for manually drilling has slow rotary speed and does not have temperature increase so that the occurrence of condition such as body tissues burn is avoided.

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