Timely treatment of photocoagulation and (or) cryotherapy for prethreshold type 1 and threshold disease of ROP may lead to famous prognosis.
对阈值前病变1型和阈值ROP及时的激光和(或)冷冻治疗具有比较满意的疗效。
Timely treatment of photocoagulation and (or) cryotherapy for prethreshold type 1 and threshold disease of ROP may lead to famous prognosis.
对阈值前病变1型和阈值ROP及时的激光和(或)冷冻治疗具有比较满意的疗效。
The deep formation has a high degree of hardness and abrasivity;the bit type selection is difficult and the ROP is low especially under the high density mud.
深部井段地层的度高、研磨性强,钻头选型困难,特别是在高密度条件下机械钻速低。
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