A number of rollers 13 are disposed at certain intervals on both sides of {HEAD ~ stages A}, B and C, and inwardly of the rollers 13 are provided a pair of chains 17 which revolve between a pair of sprockets 15 and 16 by {TAIL ~ the driving force} of a motor 14 
A number of rollers 13 are disposed at certain intervals on both sides of { HEAD ~ stages A } , B and C , and inwardly of the rollers 13 are provided a pair of chains 17 which revolve between a pair of sprockets 15 and 16 by { TAIL ~ the driving force } of a motor 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH