| 摘要 |
The filler opening of a hypodermic syringe vial is closed by a diaphragm clamped to the mouth of the vial by a closure cap carrying a hypodermic needle and the flexibility of the diaphragm is increased by annular grooves in the opposite horizontal surfaces of a center disc portion of the diaphragm to facilitate penetration of the diaphragm by the needle.
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