hard material短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 硬质材料 Adopting the method of the solid- liquid composite casting, the new type anti- impact and anti- wear hammer head, in witch the soft material and hard material are alternately arranged, were made. 采用固-液复合铸造的方法,制造出一种软硬材料相间、抗冲击及耐磨性能高的复合锤头。 cnki