Objective To observe the therapeutic effect of different operation methods in the treatment of primary deep venous insufficiency (PDVI).
目的观察不同手术方法治疗原发性下肢深静脉瓣膜功能不全的疗效。
Adoption of different selecting operation has direct effect on progressive process.
采用不同的选择操作直接影响着进化过程。
The effect of the different aperture size and the area of the membrane, operation pressure were studied.
实验中比较了不同膜管孔径、膜管面积、操作压力等对乳酸杆菌发酵液浓缩效果的影响。
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