| 摘要 |
An apparatus for automatic lifting of a trailer frame upon failure of the le af spring support comprising a housing including a first housing element and a second housing element, wherein the second housing element is positioned within and slidably coupled to the first housing element forming the housing; an air bag lifting device positioned within the housing , wherein upon actuation the lifting device exerts force to maintain a distance between the first housing element and the second housing element; and a trigger device coupled to the lifting device wherein the lifting device is actuated by the trigger device.
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