BS5839-1英国标准电气规范BritishStandard电子版下载 ABRITISHSTANDARDFiredetectionandalarmsystemsforbuildingsPart1.Codeofpracticeforsystemdesign,installationandservicing991033mBS5839:Part1:1988IncorpomtingAmendmentNos.1,2and3NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWCOPYRIGHTBritishStandardsInstituteonERC...