1. Subject content and scope of application This standard specifies the technical graphic symbols for security and protection systems. This standard is applicable to the drawing of security and protection system diagrams by scientific research, design, teaching, publishing, architecture, construction and other departments. 2. Referenced standards GB1.5 Standardization work guidelines - Rules for the preparation of symbols and code standards GB4728.3 Graphic symbols for wires and connectors for electrical diagrams GB4728.6 Graphic symbols for the generation and conversion of electrical energy for electrical diagrams GB4728.8 Graphic symbols for measuring instruments, lights and signal devices for electrical diagrams GB4728.10 Graphic symbols for telecommunications for electrical diagrams: transmission GB4728.11 Graphic symbols for power, lighting and telecommunications layout for electrical diagrams GB7093.1~7093.4 Graphic symbol representation rules GB10408.1~10408.5 Intrusion detectors IEC574-8 Audio-video recording and television equipment and their systems - Part 8 Symbols and signs
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