双刃镗刀最大镗孔直径可达()mm。 ["A.200","B.500","C.1000","D.1500"]
三舍法
套式结构立铣刀螺旋角β为()。 ["A.10°~35°","B.30°~35°","C.40°~45°","D.15°~25°"]
2~71mm的立铣刀制成()。 ["A.7∶24锥柄","B.莫氏锥柄","C.直柄","D.套式结构"]
13号、13A型钩尾销孔长径磨耗超限时焊修,焊修后与钩尾端面距离小于()时,在钩尾端面堆焊或焊装磨耗板后(四周满焊)磨平。 ["A、20mm","B、30mm","C、40mm","D、50mm"]
苏湖教法