{HEAD ~ End} of the trough is connected to exhaustor means which suck the fibre fleece towards {TAIL ~ injector}  
{ HEAD ~ End } of the trough is connected to exhaustor means which suck the fibre fleece towards { TAIL ~ injector }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH