They select a set of instruments to provide test signals and make measurements and then bolt the instruments into a standard, 19-in. rack.
他们选择一套设备来提供测试信号和度量，然后将这套设备固定在一个19英寸的架子上。
2
The suspended scale rack is mainly composed of a loading bolt, an adjusting bolt, a loading member, a weighing supporting roller, a supporting roller rack, a sensor, etc.
悬浮式秤架主要是由加载螺栓，调整螺栓，加载构件，称重托辊、托辊架、传感器等组成的。
3
The back part of the supporting rack is provided with a positioning bracket, and the positioning bracket is provided with a positioning screw bolt.