{HEAD ~ The joiner} may have {TAIL ~ one or more other neck portions} with respective retaining clips and sealing rings for joining one duct to one or more other ducts 
have
{ HEAD ~ The joiner } may have { TAIL ~ one or more other neck portions } with respective retaining clips and sealing rings for joining one duct to one or more other ducts
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH