The workers then add a glass cover, bolt on an aluminum frame, attach a junction box and package it for shipping.
工人们接下来用螺栓给一个铝框装上一个玻璃盖板，附上一个接线盒，然后包装发运。
Brittle fracture accident and countermeasure of the high-strength bolt of post junction of roof beam of.
钢结构梁柱连接处高强螺栓的脆性断裂事故及对策。
The junction of bonding jumper should be clean and covered with conductive paste. And the tightening moment for bolt must fit with equipment wiring requirements.
接线搭接面确保清洁，涂抹导电膏，螺栓紧固力矩符合设备接线要求说明。
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