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Tin concentrates. Methods for the determination of copper content and zinc mass part
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Zink concentrates. Atomic absorption method for determination of copper, lead, cadmium, cobalt, iron, potassium, sodium, gold, silver, indium, calcium and magnesium
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Joints of tubes with tube-plates and collectors of heat exchangers. Compression of tubes by sources of impulse pressure. General
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Gas supply system. Natural gas production. Field pipelines. Mechanical safety. Pressure and leak tests
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