RU缩写的意思

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