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Regulatory document. Water hardness. Measurement technique using trilon B titrimetric method
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Design guidelines for urban public utility electrical networks (with amendments as of 29.06.1999)
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Guidelines on the protection of 6-1150 kV electrical circuits against lightning and internal overvoltages. All 3 parts
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Industrial power supply design. Technological design standards. 1 revision
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Steel pressure vessels and equipment. General technical requirements
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Process modules for oil and gas industry. General technical specifications
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