PI缩写的意思

HB/L HERMES TDOP SUV TCLU RC D/R S/P RTCM CVT PM ISSC APC f.0.w. OHC ATC CCD TAP MCS EBD VASI SP 1PPM c/- CL ASR C.I.F.E. HO CCL f.i.w. S/O FAS NB IMC OX1 UHVI ST SSS VICS VRCV FPA MPFI AFR SA SLS TFV SCR DT&E M/F BIMCO C/E MPI MIL AMI AC TVO f.i.o.s. HAI B/N HPF