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数字楼宇对讲系统
方案一 https://www.aliyundrive.com/s/KN8TGgMwZcZ 方案二 https://www.aliyundrive.com/s/rTcoSA1iJt6 方案三 https://www.aliyundrive.com/s/4ZqFYUFWhLY
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电梯5方应急对讲系统
适用小区，写字楼，医院等有电梯的场景 https://www.aliyundrive.com/s/YnRN2d3PAvA 接线示意图 https://www.aliyundrive.com/s/sMD9LqFvKVc
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