| 摘要 |
A zip fastener for fastening two edges of material together, the fastener having a pair of stringers, each stringer comprising a plurality of coupling elements located on an edge of a tape, the fastener further comprising an alignment marks for matching the two edges of material together, wherein the alignment mark is a pair of open holes with an open hole being provided through the tape of each stringer, the pair of holes being located at the same level as one another along the length of the zip fastener.
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