
Steel Tubes - Unalloyed Or Alloy Steel Butt Welding Tees Made By Saw Process With Equal Or Reduced Branches, With Quality Requirements - Dimensions - Technical Delivery Conditions
出版:Association Francaise de Normalisation

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Steel Tubes - Unalloyed Or Alloy Steel Butt Welding Tees Made By Saw Process With Equal Or Reduced Branches, With Quality Requirements - Dimensions - Technical Delivery Conditions
出版:Association Francaise de Normalisation
专家解读视频