网络释义
1)bbdc (before bottom dead center),下止点前2)bbdc(before bottom dead center),下止点前3)BBDC Before Bottom Dead Center,在下止点前4)before bottom center,下死点前在下止点前5)runner band seal,下止漏环6)bottom centre,bottom dead centre,lower dead center;lower dead point,下止点7)bottom dead center,下止点8)bottom dead point,下止点9)lower dead center,下止点10)LDC Lower Dead Center,下止点