
WELDED CIRCULAR STEEL TUBES FOR MECHANICAL AND GENERAL ENGINEERING PURPOSES - TECHNICAL DELIVERY CONDITIONS - PART 1: NON-ALLOY AND ALLOY STEEL TUBES
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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WELDED CIRCULAR STEEL TUBES FOR MECHANICAL AND GENERAL ENGINEERING PURPOSES - TECHNICAL DELIVERY CONDITIONS - PART 1: NON-ALLOY AND ALLOY STEEL TUBES
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频