UID:24241
UID:23810
UID:19359
UID:24855
UID:23853
UID:25171
UID:50
引用第568楼imq66于2010-12-12 10:21发表的 :时速60等于每分钟前进1km=100000cm20寸直径圆周=20*2.54*3.14=159.512前56后11=56/11=5.09所以100000/(159.512*5.09)=123.14代表回转速123.14就可以达到.......
UID:25153
UID:23972
UID:16908
UID:14222
UID:24729
UID:19668
UID:1240
UID:24263
UID:15545
UID:20341
UID:4545
UID:25895
UID:3238
UID:14654
UID:20869
UID:24452
UID:13334
UID:25570
UID:26209
UID:25373
UID:26675