China Building intercom sy GB Standards Search Result |
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GB/T 31070.3-2021 Building intercom systems—Part 3:Technical requirements for specific applications 楼寓对讲系统 第3部分:特定应用技术要求 - 英文版 |
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GB/T 31070.2-2018 Building intercom systems—Part 2: Technical requirements for digital building intercom systems 楼寓对讲系统-第2部分:全数字系统技术要求 - 英文版 |
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GB/T 31070.4-2018 Building intercom systems—Part 4: Application guidelines 楼寓对讲系统-第4部分:应用指南 - 英文版 |
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GB/T 31070.1-2014 Building intercom systems―Part 1: General technical requirements 楼寓对讲系统 第1部分:通用技术要求 - 英文版 |
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