In a female version of the connector, {HEAD ~ a cylindrical shell} encloses {TAIL ~ a cavity} in which a collette is inserted 
encloses
In a female version of the connector , { HEAD ~ a cylindrical shell } encloses { TAIL ~ a cavity } in which a collette is inserted
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH