Russian standards PDF
Equipment for cleaning of air and other gases. Sampling and test method for cleanable filter media taken from filters of systems in operation
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Steel and alloys. Names and basic designations of brands
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External utilities. Еlectrical installations. Cables with plasti cinsulating material for 35 kV including, laying in earth (in tube ditch). Work performancerules
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Professional cleaning services – cleaning services. Сleaning in general education organizations. General requirements and safety requirements
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Professional cleaning services – cleaning services. Cleaning in preschool educational organizations. General requirements and safety requirements
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External utilities. Mounting ductile iron underground water pipelines and pressure sewage pipelines. Rules and control of work performance
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