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The instrument is used to measure the roughness coefficient of a joint. The sample is usually a rock core cut in half lengthwise or a core placed on another two. Should the surfaces or flow lines prove to be smooth, the measurement is that equivalent to the basic angle of friction of the rock. A crank handle allows accurate and continuous in..

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EN 1097-4 Used for the evaluation of the surface roughness. This simple device is  300x150  mm long ..

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Weight : 400 g..

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Weight : 600 g..

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Used for identifying minerals according to the surface hardness .The kit comprises 9 reference minerals (talc, gypsum, calcite,fluorite, apatite, feldspar, quartz, beryllium, corundum)Dimensions: 180 x 120 x 20 (h) mm.Weight: 500 g...

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