The belt portion 10 is provided with {HEAD ~ a series} of {TAIL ~ cogs} 12 on the rear side along the longitudinal direction 
of
The belt portion 10 is provided with { HEAD ~ a series } of { TAIL ~ cogs } 12 on the rear side along the longitudinal direction
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH