{HEAD ~ A front end portion} of the attaching port 41 is formed with a rib 42 in a ring like shape to enhance an effect of preventing {TAIL ~ the pipe} to be connected from being drawn 
{ HEAD ~ A front end portion } of the attaching port 41 is formed with a rib 42 in a ring like shape to enhance an effect of preventing { TAIL ~ the pipe } to be connected from being drawn
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH