
Welded Steel Pipes In Unalloyed And Low Alloy Steels For Supply Purposes, Process Plant And Tanks - Pipes With Quality Specifications, Technical Conditions Of Delivery
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Welded Steel Pipes In Unalloyed And Low Alloy Steels For Supply Purposes, Process Plant And Tanks - Pipes With Quality Specifications, Technical Conditions Of Delivery
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频