SD缩写的意思

EGR OSUCFM RU ED AHGOLEOD APFTPOS NFPARR WBGT AS P.E.O. ARIS MPN THC DOW CFC IAQ ES C&T PER FFES ETC PEFC FFCS EI AC IPCC PEL AFOC SR AR ASBL OHS SE TS LOI APC ACODS EOC NFAP DC CASS SBR ESS RORSAT SM TSP TPES UKWAS FCLPRC AT MP DIL APN LJ EM APL PS WWTS API FRS