| 摘要 |
A device for measuring compression forces, preferably compression forces acting on mine roof supports in an underground mine gallery, comprises a pair of spaced substantially parallel abutment plates between which a pressure body composed of a plurality of elongated parts of relatively brittle material and having respectively different resistance against compression forces are arranged, closely adjacent each other, and extending in longitudinal direction normal to the abutment plates to be subjected to compression forces acting in opposite directions on the abutment plates, whereby the parts will be respectively deformed to a different degree indicating thereby the magnitude of the compression forces.
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