
Steel Tubes - Galvanized, Longitudinally Welded Tubes Of Round, Square Or Rectangular Cross-section For Metallic Constructions - Dimensions - Technical Delivery Conditions
出版:Association Francaise de Normalisation

专家解读视频
Steel Tubes - Galvanized, Longitudinally Welded Tubes Of Round, Square Or Rectangular Cross-section For Metallic Constructions - Dimensions - Technical Delivery Conditions
出版:Association Francaise de Normalisation
专家解读视频