Are all cargo tank atmospheres at positive pressure with an oxygen content of 8% or less by volume?
所有液货舱大气是否维持正压，且其含氧量以体积计低于8% ？
To the large diameter of si single crystal, the big volume of melt and serious hot convection makes the oxygen content of the single crystal enlargement.
硅单晶直径增大后，大熔硅体积、严重的热对流使单晶氧含量增大。
The results showed that after modification, the specific area and pore volume of ACs decreased while the content of oxygen functional groups, especially which of hydroxyl, increased obviously.
研究表明氧化处理后活性炭的比表面积和孔容虽有减小，但炭表面的含氧官能团数量大幅增加，其中羟基的增幅最明显。
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