A.21mm,24mm B.22mm,27mm C.21mm,26mm D.21mm,27mm
A.大直徑下心盤 B.導(dǎo)框式側(cè)架 C.魚腹形搖枕 D.滑槽式制動(dòng)梁
A.65-75 B.60-70 C.60-75 D.65-70