| 摘要 |
<p>The device consists of a box connected to the body (2) of extruder (1) in front of the extrusion outlet, which is crossed by the circulation channel of the molten mass. It contains a disc (7) with perforated cavities (10) provided with interchangea-ble filters (11), the disc being rotated at a variable speed by a qp. motor.</p> |
