The online measurement of the steam quality is a difficult problem of world in petroleum industry, because of high temperature and high pressure of steam and narrow space of steam injection well.
注汽过程中高温高压和狭小的空间，使得干度在线测量成为石油开采行业中的世界性难题。
The eddy-current coils and the substrate material have better flexibility so as to measure the clearance among curved faces of any form, and can be arranged in the narrow space for measurement.
电涡流线圈及其基底材料具有良好的柔顺性，可以测试任意曲面形状之间的间 隙，适合安装在狭小的空间中进行测量。
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