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Investigating Strength Of Materials By Application Of Mechanical Stress
(AREA)
Abstract
Telephone call meter box constituted by a plate of suitable material and dimensions, whose surface is provided with a succession of orifices, arranged in rows of a determined number of them, said orifices being arranged, to receive a mobile pin that is inserted in one of them and moves to the next one each time the operation that is the subject of the count is performed. (Machine-translation by Google Translate, not legally binding)