The optic method, which based on the difference of the refractive indexes between carbon dioxide and air, estimate leaks according to principles of Schlieren and Shadow-graph.
其中，光学法是基于二氧化碳与空气的折射率有差别，利用彩色纹影法和阴影法原理来判断泄漏；
The optic method, which based on the difference of the refractive indexes between carbon dioxide and air, estimate leaks according to principles of Schlieren and Shadow-graph.
其中，光学法是基于二氧化碳与空气的折射率有差别，利用彩色纹影法和阴影法原理来判断泄漏；
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