| 摘要 |
<p>The animal stall floor grating comprises a first set of parallel bars, mounted on a second set and at right angles to them. The bars (6) in the first set are of isosceles trapezium section. They can be made from round wire, rolled so as to form two faces inclined to each other, and then two others parallel to each other, using rollers with recessed cone faces. The design allows a grating to be constructed incorporating strong welded joints and through which the dung will drop freely.</p> |
