ppm缩写的意思

SSM DTD DTP DS EEROM IM SFB ESC ABDL SSG CNCC DPON IOB DVVI DFSK NCBA DCT QDOS IS-IS EELS EF CICS S3 AP EAF ppm RIP EFCI ASI FED CPS CC AJG STB GIMM MADP ETE CSE FCN SOC UMTS CRC DVC DL CAI EWT NDS GPS CPM DFOS AFC APADAS mcu GDPS CTDM APARS ASC DCN Bps RAID