过去给水族馆的水过滤和充氧的尝试都已失败了。
Previous attempts at filtering and oxygenating aquarium water had failed.
测定了静脉脂肪乳剂分别在充氮、充氧及空气存在条件下于不同温度下的氧化规律。
The behavior of oxidation for the intravenous fat emulsion was determined under the presence of nitrogen, oxygen or air at different temperature.
本文介绍了两种压铸新技术——真空压铸和充氧压铸的基本原理、设备、特点及应用。
The new technique of vacuum diecast and oxygenation diecast are introduced in some aspects, which are basic principle, equipment, characteristic and application.
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