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Cleans tablecloths, essentially characterized by consisting of a box adaptable to the hand and inside which is arranged a central longitudinal cylindrical brush, which protrudes through a lower opening of said box and is mounted on an axle provided at both ends with wheels knurls with which respective pairs of driving wheels, knurled as well as turning, are combined on the tablecloth to be cleaned and mounted on movable axles of the box, so that, under the pressure of use, said driving wheels are applied against the of the brush, dragging the latter in rotation, whose box comprises two lateral longitudinal cavities, receiving the waste collected by the cylindrical brush when rotating and an articulated lid for access to said cavities. (Machine-translation by Google Translate, not legally binding)
A plane problem of the theory of elasticity of heterogeneous media(Plane problem for inhomogeneous elastic media based on assumption of elastic coefficients as functions of two variables defined in domain occupied by medium)