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Publication of JPS4921517B1publicationCriticalpatent/JPS4921517B1/ja
B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks