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 {TAIL ~ the site} where workpieces are deposited on a conveyor for {HEAD ~ an unloading operation} 
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 { TAIL ~ the site } where workpieces are deposited on a conveyor for { HEAD ~ 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD