NF EN 10378
NF EN 10378 (Welded stainless steel square and rectangular tubes for mechanical and structural engineering and decorative use - Technical delivery conditions)· AFNOR NF (法国) · 46 种材料
NF EN 10378 (Welded stainless steel square and rectangular tubes for mechanical and structural engineering and decorative use - Technical delivery conditions)· AFNOR NF (法国) · 46 种材料