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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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Arrangements for fastening heat insulation of steel vessels and apparatus. Construction and dimensions. Technical requirements
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Petroleum and petroleum products. Method for determination of water content
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Gas supply system. Natural gas production. Field pipelines. Mechanical safety. Pressure and leak tests
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