磨钻、骨凿、刮勺和拉钩；

The invention also comprises an abrasion drill, a bone chisel, a spatula and a drag hook.

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介绍了以回转双曲面作为麻花钻后刀面的数学模型，研究了钻头设计参数与刃磨参数的关系。

Mathematical model for twist drill hyperboloid grinding is introduced. The relationship between drill design para meters and grinding parameters is studied.

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介绍了以回转双曲面作为麻花钻后刀面的数学模型，设计参数与刃磨参数的关系。

Mathematical model for hyperboloid grinding of twist drill and relationships between drill design and grinding parameters are introduced.

youdao