The open end bladder provided in accordance with the present invention has an annular form and {HEAD ~ a pair} of {TAIL ~ openings} extending through the bladder in the axial direction thereof 
of
The open end bladder provided in accordance with the present invention has an annular form and { HEAD ~ a pair } of { TAIL ~ openings } extending through the bladder in the axial direction thereof
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH