"Improvements in devices for the shoring of pits in steep layers", in the internal service of mines, in which the fronts are held by at least one montera that runs in the longitudinal direction with the cut, against which two masons rest. or struts, preferably of adjustable length, characterized in that the hood is developed as interconnectable sections of a profile beam, especially a hollow profile or box-shaped beam, to which the inclined masons are coupled so that they can be refute to a limited extent and so that they can be recovered. (Machine-translation by Google Translate, not legally binding)
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