The two gear trains are arranged so that in the case of power transmission through any selected gear train other than the two gear trains, such one of {HEAD ~ the two gear trains} that has {TAIL ~ a change speed stage} nearer the change speed stage of the selected gear train has been selected by the selection mechanism 
The two gear trains are arranged so that in the case of power transmission through any selected gear train other than the two gear trains , such one of { HEAD ~ the two gear trains } that has { TAIL ~ a change speed stage } nearer the change speed stage of the selected gear train has been selected by the selection mechanism
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH