The concomitance's disease was the critical element for patients who received surgery. 手术治疗患者的主要影响因素是患者伴随疾病的个数。
Seperately, this paper also discusses the courses, results and influencing factors of scouring of the fluidic element materials. 分别讨论了泥浆中的颗粒对射流元件材料的冲蚀过程和冲蚀效果，以及影响因素。
