A change gear system comprises a driven case, {TAIL ~ a driving shaft} and shifting means for shifting the drive shaft, and three sliding frames are provided in {HEAD ~ alignment} in the driven case 
A change gear system comprises a driven case , { TAIL ~ a driving shaft } and shifting means for shifting the drive shaft , and three sliding frames are provided in { HEAD ~ alignment } in the driven case
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH