O/B缩写的意思

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