在安装前螺栓的螺纹及螺母应用防磨损剂包覆。
Threads of bolts and nuts shall be coated before installation with anti-galling agent.
用螺纹联接并起紧固作用的零件称为螺纹紧固件。常用的螺纹紧固件有螺栓、双头螺柱、螺钉、螺母、垫圈等。
Parts with threads used for joining and fastening are called screw fasteners. The most widely used components as screw fasteners are bolts, double screw bolts, screws, nuts, washers.
订婚后的第一个T形截面可能有一个L形的成员，洗衣机，中间成员，螺纹螺栓和螺母。
The engagement section having a T-shaped cross-section may have an L-shaped member, a washer, an intermediate member, a threaded bolt and a nut.
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