The formation of oxygen precipitates and threading dislocations in top Si layer could be avoided by low temperature annealing.
低温退火可以避免在顶部硅层中氧沉淀及延伸位错等缺陷的形成。
A prototype of pulse detonation rocket engine (PDRE) is introduced to solenoid valves for the control of oxygen, kerosene and isolation gas; thus continuous combustion is avoided.
简述了脉冲爆震火箭发动机的实验系统，利用电磁阀控制煤油，氧气和隔离气体，避免了连续燃烧。
The occurrence of complications can be avoided to ensure the safety of hyperbaric oxygen therapy.
也可避免并发症的发生，保证高压氧治疗的安全。
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