A.1-2-3-4-5-6 B.1-3-5-2-4-6 C.1-5-3-6-2-4 D.1-5-2-6-4-3
A.進(jìn)氣 B.壓縮 C.爆發(fā) D.排氣
A.滑動(dòng)軸承 B.滾動(dòng)軸承 C.推力軸承 D.關(guān)節(jié)軸承