| 摘要 |
<p>The device has self supporting portals (2,4,8) provided with hoist pipes (10-24). Lattices (66,68) and fodder devices (74,76) hang from the hoist pipes. A positioning unit is provided to position portals with reference to a bottom surface (6). The portals form a perpendicular stand with horizontal carrier. The area stretched by the portals is restricted to the walls e.g. side walls formed from wire mesh.</p> |
