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