STAS 6855
STAS 6855 (Refractory alloy and anticorrosive steel castings. Grades and general technical requirements for quality)· STAS (ルーマニア) · 26 材料
STAS 6855 (Refractory alloy and anticorrosive steel castings. Grades and general technical requirements for quality)· STAS (ルーマニア) · 26 材料