By analyzing the advantages of vibratory tapping and extruded tapping, the vibration extruded tapping method was put forward.
通过分析振动攻丝和挤压攻丝的特点，提出振动挤压攻丝方法。
By analyzing the advantages of vibratory tapping and extruded tapping, the vibration extruded tapping method was put forward.
通过分析振动攻丝和挤压攻丝的特点，提出振动挤压攻丝方法。
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