NEN EN 10378
NEN EN 10378 (Welded stainless steel square and rectangular tubes for mechanical and structural engineering and decorative use - Technical delivery conditions)· NEN (オランダ) · 46 材料
NEN EN 10378 (Welded stainless steel square and rectangular tubes for mechanical and structural engineering and decorative use - Technical delivery conditions)· NEN (オランダ) · 46 材料