亲像火车烟囱管 jin chu hui qia N duan gong wa ; jin chu hui qia N duan gong

火警烟雾气管信号系统 pneumatic tube fire alarm system

烟管火警系统 smoke pipe fire alarm system

烟管火警探测系统 smoke pipe fire detecting system

烟管式火警装置 smoke tube type fire alarm system

烟管式火灾报警装置 smoke vent system

烟管式火灾报警系统 smoke vent system

烟管式火警信号系统 smoke pipe fire alarm system