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Electricity metering equipment (a.c). Particular requirements. Part 21. Static meters for active energy (classes 1 and 2)
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Electricity metering equipment (a.c). Particular requirements. Part 23. Static meters for reactive energy
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Well sucker rod pump drives. General technical requirements
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Crude oil petroleum products. Determination of vapour pressure by Reid method
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Water. Determination of oil products using gas chromatography method
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