| 摘要 |
The envelope of the life jacket is provided with a zip fastener of which the two rows of connecting teeth are made of polymerized plastic material and are separated at the fastener end corresponding to the narrow end of the slide (i.e., at the end of the normal opening stroke of said slide) whereby the inflation of the inner article from the zone adjacent to said end will cause the gradual and automatic opening of the envelope which can subsequently be reclosed by effecting a complete stroke of the slide in both directions.
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