带螺母的螺栓或螺钉被广泛用于固定机器以及结构的部件。
Bolts or screws with nuts are widely used for fastening machine and structural components.
使用联接器，夹子，螺钉，螺栓，水泥或焊接，钎焊和焊接设备连接管件。
Join pipes using couplings, clamps, screws, bolts, cement or soldering, brazing and welding equipment.
操作机器或设备，焊接，螺栓，螺钉或铆钉金属零件。
Operate machines or equipment which weld, solder, bolt, screw or rivet metal parts together.
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