Unified Systems of Design Documentation. Standard graphic symbols. Pipeline valves and fittings
Единая система конструкторской документации. Обозначения условные графические. Арматура трубопроводная |
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Rosstat 49Approving the statistical tools for the … |
MinTran 156On approval of the provision on the seaport … |
SNiP III-4-80, ver1Construction Standards and Regulations. … |