An inner periphery of the socket is provided with a seal ring for sealing an interval between the inner periphery of the socket and {HEAD ~ an outer periphery} of {TAIL ~ the plug} in an airtight manner and a hold ring for restricting movement of the seal ring in an axial direction 
An inner periphery of the socket is provided with a seal ring for sealing an interval between the inner periphery of the socket and { HEAD ~ an outer periphery } of { TAIL ~ the plug } in an airtight manner and a hold ring for restricting movement of the seal ring in an axial direction
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 HEAD REL 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