| 摘要 |
<p>A cover arrangement for a manure pit comprising a support arch extending over the manure pit, a cover formed of sheet material which is secured with an upper portion of a wall extending about the manure pit, a cable extending between opposed sides of the wall, the cable passing over the arch and being secured thereto, a block mounted to another side of the arch, a further cable secured to the cover and to the block and a winding arrangement for raising and lowering the cover.</p> |
