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performing pull test on the already grouted roof bolts. the test is meant formeasuring the load bearing capacity / anchorage strength of the bolt. it shows the frictional bondage between the steel bolt, cement / resin grout and the rock surface of inner periphery of the drilled hole. advantages: for...
rate for trend , , , h/ min humidity water reservoir capacity/operating time per litre ml / > h at c humidity control / oxygen control ± % / ± % power failure yes hood numbers of doors/arm accses openings/iris diaphragm/tube grommets / / / noise level (interior) < dba lying surface air flow ≤ m/s dimentions...