{TAIL ~ at least two yarn feeders} serving a said yarn feeding and delivering {HEAD ~ means}; and 
{ TAIL ~ at least two yarn feeders } serving a said yarn feeding and delivering { HEAD ~ means } ; and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH