针对小直径螺栓和螺钉的拉伸试验要求，设计了一种拉伸试验装置。
To meet the needs of tensile test for small diameter bolt and screw, this article gives a design of tensile testing device.
每年检查并拧紧所有螺钉、螺栓和各种固定装置。
Annual check and tighten all the screws, bolts and fixing device.
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.
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