| 摘要 |
<p>The machine i.e. boat (1), has shells (2, 3) connected by arms (4, 5), where component parts of the shells are located between ends of the arms of a rectangular or trapezoidal hinge structure. The ends of the arms carry a group of hinge portions (6a-9a) interacting with other group of portions (6b- 9b). Articulation axes of four linkage bars (6-9) are formed and oriented to arrange the bars along four edges of a pyramid part, where shape of a base of the pyramid part is same as shape of a projection in horizontal plane of the structure. An apex of the pyramid part is located in the structure.</p> |
