{HEAD ~ A number} of rollers 13 are disposed at {TAIL ~ certain intervals} on both sides of 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 the driving force of a motor 14 
{ HEAD ~ A number } of rollers 13 are disposed at { TAIL ~ certain intervals } on both sides of 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 the driving force of a motor 14
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH