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。
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。
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.
用有机玻璃塔研究了非均匀穿流塔板的结构与性能，分析了氧解吸的传质效率。
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.
用有机玻璃塔研究了非均匀穿流塔板的结构与性能，分析了氧解吸的传质效率。
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