| 摘要 |
The system comprises a sleeve (2) which is hinged to the frame and has a series of positioning holes (5) and at least one locking hole (7). The side-piece (1) has an end (10) which slides into the sleeve, it has a stud (8) to engage with one of the positioning holes and a hinged tip (7) to engage with the locking hole.The stud and positioning holes are circular in shape, while the hinged tip and locking hole are rectangular, with the locking hole situated next to the last positioning hole to prevent the side-piece from disengaging spontaneously.
|
