特殊螺纹 meaning in Chinese
special screw threads
Examples
- Standard specification for zinc coating , hot - dip , requirements for application to carbon and alloy steel bolts , screws , washers , nuts , and special threaded fasteners
碳钢和合金钢螺栓螺钉垫圈螺母和特殊螺纹紧固件用热浸镀锌覆层的标准规范