| 摘要 |
<p>A casing has a casing body and an end plate 60 and has propellant filled inside thereof. Gas discharge holes 62, 66 are provided to recess from an outer or inner surface of the metallic casing body and are sealed by a film 64, 68. The film is formed by a molding integrally with the casing body and may be of non-uniform thickness. The films 64, 68 may have differing thicknesses. <IMAGE></p> |
