A tube connection piece is rotatably connected to the coupling sleeve and has a portion provided with a sealing ring, said portion extending sealingly into {HEAD ~ a socket} in {TAIL ~ the connected position} 
in
A tube connection piece is rotatably connected to the coupling sleeve and has a portion provided with a sealing ring , said portion extending sealingly into { HEAD ~ a socket } in { TAIL ~ the connected position }
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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL