Balloon closure, has lower part whose profile surface is rounded inwardly with cylinder bore diameters, and upper part whose profile is curved outwardly, where closure is fastened to filled balloon and manufactured from hard rubber
摘要
<p>The closure has manufactured blocks with size of 1 to 2 cm and connected with one another on a rear side in a rotatable manner by using a hinge e.g. piano hinge made from wood, where the closure is fastened to a filled balloon and manufactured from hard rubber. A lower part has a profile surface that is rounded inwardly with different cylinder bore diameters, and a profile of an upper part is curved outwardly.</p>
