| 摘要 |
<p>A male screw member is advanced by the meshing and rotation with a female screw member so as to extrude the contents of a container. The male screw member and a pressing section for pushing the contents are formed as an integral assembly and this assembly is assembled into the container. The diameter of the female screw member can be varied so that meshing between the male screw member and the female screw member can be released.</p> |
