| 摘要 |
<p>The device has a square or round tube-shaped filtering element (C1) with a section appropriate to the shape of an open pipe. The element occupies a maximum part of internal volume of an open pipe. The element is prolonged by a straight part from a cylindrical-shaped main body (G) in the element to an outer edge (D) of the pipe. A cover (A1) maintains the device at the interior of the volume. The element is in contact with the volume, and includes longitudinal threads located at the exterior of the main body. The element is a perforated fine sheet, a lattice or a net with calibrated meshes, of size appropriate with the materials to be filtered.</p> |
