The reference 197A signifies that the substance under examination is intimately in contact with an internal reflection element for attenuated total reflectance (ATR) analysis.
提到意味着该待检物质紧密地接触用于衰减全反射（ATR）分析的内反射元件。
The reference 197A signifies that the substance under examination is intimately in contact with an internal reflection element for attenuated total reflectance (ATR) analysis.
提到意味着该待检物质紧密地接触用于衰减全反射（ATR）分析的内反射元件。
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