| 摘要 |
1,038,321. Reducing noise in pipes. A.B. GUSTAVSBERGS FABRIKER. Feb. 5, 1964 [Feb. 5, 1963], No. 4919/64. Heading F2P. [Also in Division E1] A device for insertion into a water supply system at a point where noise occurs when the system is in use due to the pressure drop at the point comprises at least two closed conduits connected in parallel and of a length and crosssection to cause an appropriate hydraulic resistance to limit flow at said point. The device may comprise a circular pipe that has been partially flattened or otherwise deformed or a circular pipe having a conduits-defining insert therein.
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