{HEAD ~ The end supports} of {TAIL ~ the support roller} for the lower belt rest on a hydraulically actuated piston which enables this support roller to be displaced towards the other support roller 
of
{ HEAD ~ The end supports } of { TAIL ~ the support roller } for the lower belt rest on a hydraulically actuated piston which enables this support roller to be displaced towards the other support roller
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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