前角取零度或负值也是可能的。

It is possible to have rake angles at zero or negative.

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论述了径向负前角硬质合金滚刀的设计及切削条件。

Design and cutting condition of carbide hob with radial negative front Angle were discussed.

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向体前将另一脚伸出，脚要伸直，与水平面成45角。

Hold the other foot out in front of you, leg straight at about 45 degrees.

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这个角一年前就成立了。

This corner was set up a year ago.

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这个角一年前就成立了。

This corner was set up a year ago.

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