单项选择题
(A)方形孔; (B)内角; (C)平面; (D)凹弧面
(A)平锉; (B)方锉; (C)什锦组锉; (D)圆锉
(A)0.6kg; (B)0.65kg; (C)0.75kg; (D)0.85kg
(A)100mm; (B)200mm; (C)300mm; (D)400mm
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