| 摘要 |
The sections (6,7) hinge together among a line (8), and have locking devices (9,10) securing them together in the position clamping the curtain edge between them. The hinge can be formed by flexible material thinner than the sections themselves, being integral with them and of plastics. The locking devices can comprise two or more pins on one section, fitting in mating recesses in the other. Each pin can have an arrow-head divided by a lengthwise slot, so as to form two spring halves.
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