US5531634AMethod of using an abrasive material for
A method for blast cleaning a solid surface using an abrasive composition of calcium carbonate wherein the abrasive-blasting operation uses blasting apparatus including a blasting pot a blasting hose and spray nozzle connected to the blasting pot an air compressor and compressor air lines connected to the blasting pot and blasting hose and spray nozzle comprising the steps include filling
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boulders-larger than 3 inches layer of 3/4-inch-diameter crushed stone at least 4-inches deep is compacted over a filter fabric covering the subsoil as a drainage layer to keep water away from underside of slab. -Slabs range from 3 inches to 6 or 8 inches up to a foot for an airport runway.
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The archaeological ochre pieces vary in texture and show features intermediate between EXP1 and EXP2. Depending on the facet surface one to three 4 x 3 mm 2 areas were captured per facet. We used a 20x objective (N.A. 0.45) with green light illumination and a
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