dynamicobservation相关论文
The dynamic observations of bainitic transformation in a Fe-C-Mn-Si superbainite steel were conducted on a high temperat......
目的 为了探讨早、中、晚期孕妇血清中甲胎蛋白(AFP)的含量变化及规律,以助于对宫内胎儿生长的动态观察.方法 正常对照组100例,我......