AA缩写的意思

ADC HSUS CNKI CRl SD PRD PFMEA CMRS PMRC CBE FP AR Demo NESRI IAU Phil ADI TUC ACTC DCT GMSS ACCAUD SLR IAF CIP PI CCTT CAS AICARDES LDB MC DJ AA DIDMCA PIR vis RBV AYH BP SRS naut ONG aar PRD boil ADS D-Day ARU OSHL BS sif AIC NHA WMIC Z IFLA AS ASN RH DSS