| 摘要 |
A device for delivering an aerosol, comprising: a casing member, a valve stem, and a diaphragm. The diaphragm is made of an ethylene-propylene-diene rubber ("EPDM") and is stable to dimensional change when exposed to 1,1,1,2-tetrafluoroethane or 1,1,1,2,3,3,3heptafluoroethane..
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