消防备用照明和疏散照明的区别及应用
链接：消防工程 https://mp.weixin.qq.com/s?__biz=Mzg4MTE3MzM1Nw==&mid=2247499605&idx=3&sn=29f1cbf3a46d8042e7228d489f5d9bef&chksm=cf6b4957f81cc041ec02ea9181b49395285f8f111c05827b5748958ecb6e4dd3b44e6dca7ef4&mpshare=1&scene=23&srcid=#rd