| 摘要 |
<p>An essentially closed hollow body or the float receives liquid in a lower portion for ballast and air in an upper portion for floatation with a vertical guide sleeve therethrough being offset at one side of the hollow interior slightly spaced inwardly of a part of the body sidewall. A liquid and air flow opening is formed through the body sidewall part horizontally centered relative to the guide sleeve so that flow paths are created segregated approximately one half around either side of the guide sleeve. By arcuately forming the body interior and the guide sleeve, not only are the flow paths smoothly arcuate, but the circuitous nature thereof muffles echoing sounds created within the hollow body from passing outwardly of the body through the flow opening.</p> |
