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specification GB503112007 system grounding and safety requirements GB1405093 security monitoring in the form of digital video and audio encoding and decoding technology GB/T257242010 security engineering technical specification GB503482004 specification for design of video monitoring system GB503952007 design code for industrial television system GBJ115 code for acceptance of security GA/T3082001 code for design of electronic information system of the engine room ... Intelligent building design standard GB/t 503142006 specification for electrical design of civil architecture intelligent code for construction quality acceptance of JGJ/T 1692 GB503002001 GB503392006 the architectural engineering construction quality approval unification