| 摘要 |
<p>This device consists of an enclosure subdivided internally by a partition perforated by a great number of holes having parallel axes and opening on one side into a single chamber and on the other side into two separate chambers by a longitudinal partition. A suitable shutter permits of covering in said single chamber holes corresponding to one of said separated chambers and at the same time uncovering the equivalent number of holes opening into the chamber 3 for the purpose of varying the proportion of the outputs of the two fluxes.</p> |
