| 摘要 |
<p>The device comprises a cylindrical sleeve provided, at one end, with an extension for closing the neck of the bladder, which extension has transverse openings for communicating with the axial hole of the sleeve, and having, at the opposite end, a removable plugging means, for the said axial hole, and in that it also has a semi-rigid rod provided with a rounded end and with a flange and a holding grip at the other end, for the introduction of the cylindrical sleeve until the neck of the bladder has been closed. <IMAGE></p> |
