Analyze the reasons for abnormal elevation of pressure differential in methanation system, introduce the treatments and preventive measures.
分析查找甲烷化系统压差异常升高的原因，介绍处理办法以及今后的预防措施。
Even a modest elevation of arterial blood pressure leads to shortened life expectancy.
即使是强度不太大的动脉高血压也会缩短人的寿命。
With the elevation of test temperature and pressure, the rocks and minerals were deformed from brittleness to ductility.
随试验温度、压力条件的升高，岩石、矿物从脆性变形向塑性变形演变。
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