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