| 摘要 |
<p>The construction elements consist of tubes of rectangular section. Several tubes are laid together to form an I shaped section which can be used for the manufacture of rigid frames. When three sections are placed together, rubber strips are mounted between the tubes. The tubes are connected by means of special pins (8, 9) and a snap connector. The pins have a round head at one end (8a, 9a), and a groove (20, 21) in the shaft in the other end. The round heads are inserted in the two tubes, which are mounted across the ends of the main tube, through key-slot holes. Brackets with two slotted holes are pushed over the ends of two pins, which face one ANOTHER through holes provided in the side of the main tube.</p> |
