Objective to discuss the treatment efficiency of the biological amniotic membrane plugging to treat the meta-central corneal perforation.
目的探讨生物羊膜填塞缝合固定术治疗偏中心角膜穿孔的疗效。
2
For the gas condensate well, it is difficult to evaluation the efficiency of the super covered perforation, since there are many influence factors.
对于天然气和凝析油同产井，评价超完全覆盖射孔效果影响因素增多，加大了评价难度。
3
The structure and performance of perforated plates of non-uniform perforation are studied in a plastic column and the mass transfer efficiency of oxygen desorption is analysed.