| 摘要 |
<p>The base (2) has a base plate and a semi-spherical elevation (5) that is provided on a surface of the base plate. A top side of the semi-spherical elevation includes a circular opening (4) that is provided for pulling an end (11) of a balloon (1) and closed after entry of the balloon by recovering thickness formed by knotting. An opening is provided at an edge of the base plate and accommodates an additional fastening unit.</p> |
