Double circuit power supply and emergency generator for the building.
大厦采用双回路供电，配有应急发电机。
Double circuit, air brake, drum type.
双电路，空气制动，滚筒式。
The analog part is the unit of analog circuit of double current loop.
模拟部分为双电流环模拟电路单元。
The analog part is the unit of analog circuit of double current loop.
模拟部分为双电流环模拟电路单元。
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