| 摘要 |
PURPOSE:To prevent foreign matter and impurity from being mixed into a liquid chemical and keep the liquid chemical highly pure over a long period of time. CONSTITUTION:A structure is composed of an inner stopper 1 and an outer stopper 2, and they are fitted together. The inner stopper 1 has a projection sticking toward a container, and the outside diameter of the projection is larger than the inside diameter (b) of the mouth of the main body of the container. Thus, it can be used, for example, in the packing of car audio-equipment whose depths slightly differ. |
