The results show that matrix steel 65Nb is ledeburite, the eutectic morphology is platelike, the photomicrograph of cast structure of 65Nb matrix steel is similar to M2 high-speed steel.是什么意思_The results show that matrix steel 65Nb is ledeburite, the eutectic morphology is platelike, the photomicrograph of cast structure of 65Nb matrix steel is similar to M2 high-speed steel.在线翻译_英语_读音_用法_例句