NP EN 10378
NP EN 10378 (Welded stainless steel square and rectangular tubes for mechanical and structural engineering and decorative use - Technical delivery conditions)· NP (ポルトガル) · 46 材料
NP EN 10378 (Welded stainless steel square and rectangular tubes for mechanical and structural engineering and decorative use - Technical delivery conditions)· NP (ポルトガル) · 46 材料