锯链的驱动张力是驱动力与切削阻力及摩擦阻力相对抗而产生的，在不同位置其大小不等。

Drive tension is caused by resistance of driving force and cutting resistance and frictional resistance and it is not the same value at different places.

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根据本发明的刀片具有锯状或波纹状的边缘部以提供优异的切削性能。

The blade according to the present invention has a saw like or wavy edge part to provide an excellent cutting ability.

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其目的在于提供一种锯、钻定位准确，使用方便，可减少病人损伤的便携式手术用切削工具。

The tool's objective is to provide a portable surgery cutting tool, which can locate sawing and drilling accurately, and is easy to be operated, reducing the damage to the patient.

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