导电件螺纹孔采用无切削攻丝新工艺，解决了已往导电件螺纹容易滑牙的缺陷。
Conductive thread of a hole without cutting tapping new technology to solve the past conductive thread easily slip teeth of the defects.
铁路运输设备。带开槽螺纹端头的无孔轴。开槽螺纹端头。
Railway transport equipment. unbored axles with grooved screw - ends. grooved screw - ends.
铁路运输设备。带开槽螺纹端头的无孔轴。开槽螺纹端头。
Railway transport equipment. unbored axles with grooved screw - ends. grooved screw - ends.
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