China Building intercom sy GB Standards Search Result |
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1. Ready translated GB standards  and Chinese version GB Standards, you can purchase directly in the web page; After receive your payment, we will send the GB Standards PDF file to your Email within
1~3 days.
2. Other English version GB Standards are not ready translated, only after get your order, then we translate them, time usually need 3-5 days . |
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GB/T 31070.3-2021 Building intercom systems—Part 3:Technical requirements for specific applications - 英文版 |
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GB/T 31070.2-2018 Building intercom systems—Part 2: Technical requirements for digital building intercom systems - 英文版 |
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GB/T 31070.4-2018 Building intercom systems—Part 4: Application guidelines - 英文版 |
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GB/T 31070.1-2014 Building intercom systems―Part 1: General technical requirements - 英文版 |
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