退刀 meaning in Chinese

retract
tool backlash movement

Road vehicles . fillets , chamfers and backing off
道路车辆.环槽倒角和退刀槽
Thread run - outs and thread undercuts for external threaded fasteners
外螺纹紧固件用退刀螺纹和螺纹根切
Run - outs , undercuts and chamfers for general purpose metric screw threads
普通螺纹收尾肩距退刀槽和倒角
Relief grooves - types and dimensions
退刀槽.类型和尺寸
Run - outs , undercuts and chamfers for general purpose metric screw threads
普通螺纹收尾肩距退刀槽和倒角

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