Russian standards PDF
Mining. Method of directional hydraulic fracturing of roof softening in coal mines
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Ship cable tips with a flat clamping part for cables and wires of sections up to 16 mm2. Technical requirements
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Ship electric power systems.Voltages and frequencies rated
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Green' standards. Green and operated roots of buildings and structures. Technical and environmental requirements
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Refractories and refractory raw materials. Methods of true density determination
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