现有菜刀的刀刃角度较小，切菜时省力。

The knife blade Angle is small, when cutting labor.

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斧头的刀刃角度较大。

The axe blade Angle is larger.

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在设备研制成功的基础上，对钻孔机钻头不同钻尖、不同切土刀刃角进行了实地试验研究和分析。

Based on the machine development, a research and analyses of auger drill bits with different kinds of drill tips and soil cut blade angles were carried out in tree planting field.

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