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classificationCode:"ipc:a61l"
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classificationCode:"ipc:b01l"
METHOD AND APPARATUS FOR FIRE VENTILATION AND SMOKE EVACUATION IN RUNNING TRAIN TUNNEL
Anti-collision early warning device based on UWB accurate positioning
Visual hidden danger management method and system for coal mine
Subway section civil air defense door abnormity linkage protection method and system
AUTOMATIC DRIVING SYSTEM OF MONORAIL HOIST DRIVEN BASED ON DIGITAL TWIN AND METHOD THEREOF
Rail transit interval tunnel evacuation system and method