SUPPORT STRUCTURE FOR MANHOLE COVERS

An adjustable leveling apparatus for manhole covers, grates and the like within ground and similar structures, employing an annular extension ring received within an annular base ring having an internal ring seat, the extension ring being provided with inwardly disposed rigid bar members deformable...

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Bibliographische Detailangaben
1. Verfasser: FRANCIS LEBARON
Format: Patent
Sprache:eng
Schlagworte:
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