| 摘要 |
sealing cap for barrel valves is disclosed herein. It is of plastic material and designed to be destroyed upon removal thereof from the barrel. It is composed of a disc intended to cover the opening of the barrel and prevent its forcing, and the cylindrical periphery the inner side of which joins the disc via fine breakable locking elements. Quite rigid and unbreakable strong teeth are located into the cylindrical periphery to be hooked on the opening of the barrel. |
