
STEEL BARS, STEEL SECTIONS - HOT ROLLED ROUND EDGE CHANNELS - DIMENSIONS, WEIGHTS, PERMISSIBLE VARIATIONS, STATIC VALUES
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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STEEL BARS, STEEL SECTIONS - HOT ROLLED ROUND EDGE CHANNELS - DIMENSIONS, WEIGHTS, PERMISSIBLE VARIATIONS, STATIC VALUES
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频