???? ?????? ?? ????????? ?????? ??? ????? ????? ?? ????? ?? ??????? ?????? ??? ????? ???? ???? ??????? ???????? ??? ??? ??????? ??? ??????? ?? ????? ?? ????? ????? ???????.The NFPA has identified that almost all of fires in offices come about in spots devoid of smoke detectors. Smoke detectors should be put in every single place and hallway of busi