Home / Standards / GB/T 46577-2025 GB/T 46577-2025 Active Technical specifications for general surveying of urban underground municipal infrastructure 城市地下市政基础设施普查技术规范 Standard Type GBT ICS 93.020 CCS P10 Status 现行 Issue Date 2025-10-31 Implementation 2026-02-01 Responsible Dept 国家标准委 Drafting Unit N/A