vertical shaft for light-current
... light-current system 弱电控制系统 Light-current 调光电流 Vertical Shaft for Light-Current 弱电竖井 ...
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电视系统：有线电视系统到建筑物每层弱电竖井；预留卫星电视接收系统。
TV system: Community Antenna Television system and weak current silo are all installed in every building; Reserve enough room for installing Satellite Antenna Television system.
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