The proportion of austenite in the matrix of as-cast cast iron 290Cr26MoW increases but that of martensite decreases.是什么意思_The proportion of austenite in the matrix of as-cast cast iron 290Cr26MoW increases but that of martensite decreases.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句