plastAHDˈplast,-aaəst,-aistCOCA¹¹²⁵¹⁷ 基本例句 suff.表示“体³³;粒³³;团” The ways of improving the toughness of white cast iron Were reviewed by means of low- alloying, modification, hot plast deformation, casting and heat treatment. 从低合金化、变质处理、热塑性变形、铸造和热处理等几个方面,综述了国内提高普通白口铸铁韧性研究的进展情况。 chemyq