{HEAD ~ The rotation axle} 16 is driven by a rotary drive 19 in {TAIL ~ the usual way} with an adjustable speed of rotation 
is driven in
{ HEAD ~ The rotation axle } 16 is driven by a rotary drive 19 in { TAIL ~ the usual way } with an adjustable speed of rotation
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH