| 摘要 |
A static device and method of making is disclosed for mixing matter flowing therethrough. The invention comprises a tube having a polygonic cross section defining a plurality of corners. The tube is spirally twisted with the plurality of corners forming a plurality of helixes for causing the matter flowing through the tube to rotate in accordance with the plurality of helixes. A center section of the spirally twisted tube is formed in an arc having an arc center disposed normal to said axis of said twisted tube.
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