| 摘要 |
One end of a hose is affixed to the underside of the object which may descend and whose impact has to be cushioned while the other end of the hose is pulled through the first end, the two ends are separately fastened permitting filling of the hose; a second hose may be inserted in the first one to provide separate filling spaces, one being the interior of the second hose and the other one being the gas space between the two hoses whereby different pressures permit selection of the resilient characteristics of the cushion.
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