This allows conveyors to remain at fixed elevations and merely change the site at which the workpieces are picked up in the case of a loading mechanism from a feed conveyor and {HEAD ~ the site} where {TAIL ~ workpieces} are deposited on a conveyor for an unloading operation 
where
This allows conveyors to remain at fixed elevations and merely change the site at which the workpieces are picked up in the case of a loading mechanism from a feed conveyor and { HEAD ~ the site } where { TAIL ~ workpieces } are deposited on a conveyor for an unloading operation
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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH