题目：
车刀的主偏角越大（）。径向切削力就越（），使工件变形越（），故在车削细长轴时，车刀主偏角应选取较（）值。
答案：
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参考答案：升速降压
车刀的主偏角越大（）。径向切削力就越（），使工件变形越（），故在车削细长轴时，车刀主
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