
SEAMLESS 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)

專家解讀視頻
SEAMLESS 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)
專家解讀視頻