... 备用经线仪 hack chronometer 备用天线 reserve antenna 奔浪泡沫线 foam line ...
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ship reserve antenna 船舶备用天线
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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.
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。
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