Cast iron material used for fine makings of gray iron or alloy cast iron.
所用铸铁材料为细颗料的灰口铸铁或合金铸铁。
Nb has little effect on matrix structure of gray cast iron.
铌对过冷灰铸铁的基体组织无明显影响。
Gray cast iron is a common material for the part of the agricultural machinery.
灰铁为农机零件常用材料，磨损是灰铁零件最常见的失效形式。
Gray cast iron has the worst wear resistance.
灰口铸铁的耐磨性及加工硬化能力最差。
Gray cast iron, ductile iron, carbon steel.
灰铸铁，球墨铸铁，碳钢。
Gray cast iron, ductile iron, carbon steel.
灰铸铁，球墨铸铁，碳钢。
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