lithium hydride短语¹⁴⁴⁹⁷²⁺² 基本例句 氢化锂 By the surface roughness prediction model the study investigates the influence of cutting speed, feed and cutting depth on surface roughness in lithium hydride turning process. 通过所建立的粗糙度预测模型，研究了车削过程中切削速度、进给量、切削深度对表面粗糙度的影响。 chemyq