The actue toxic effect of heavy metal Cu ~ ( 2 + ) to Stentor Polymorphrus ( Ciliophora, Heterotrichida ) was studied. 研究了重金属铜对异毛目纤毛虫多态喇叭虫 ( Stentor polymorphrus ) 的急性毒性影响.
介绍了平齿根齿侧配合英制渐开线花键计算、测量的基本公式及方法.This paper introduces calculation and measurement of BRITISH Standard Involute splines.里基本上涉及了渐开线行星齿轮传动的整个领域.The whole field of planetary gear transmission is dealt - with.渐开线花键滚轧轮的设计是渐开线花键...