| 摘要 |
A spring means formed integrally with a base the spring means consisting of a number of leaves projecting from the base at spaced intervals around a point, the leaves being all angularly inclined to the base and extending along helical paths in the same direction and being arranged so that spaces are left between them in an axial direction. It is preferred that the base and the leaves are moulded together for example, by injection moulding from a synthetic plastic material. The spring means are of general applicability but have a special application in connection with aerosol valves.
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