{HEAD ~ The sealing ring} has {TAIL ~ a ring section} received in another groove in the outer surface of the neck portion and a resilient skirt which provides a seal between the neck portion of the joiner and the duct 
has
{ HEAD ~ The sealing ring } has { TAIL ~ a ring section } received in another groove in the outer surface of the neck portion and a resilient skirt which provides a seal between the neck portion of the joiner and the duct
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH