In the instruction of industry and civil, hotel, grogshop, library, the department of scientific research and trade, the fire alarm system has become the necessary installation.
在工业和民用建筑、宾馆、酒店、图书馆、科研和商业部门，火灾报警系统已成为必要的装置。
In the instruction of industry and civil, hotel, grogshop, library, the department of scientific research and trade, the fire alarm system has become the necessary installation.
在工业和民用建筑、宾馆、酒店、图书馆、科研和商业部门，火灾报警系统已成为必要的装置。
应用推荐