Infra - red absorption takes place only when there is a change of dipole moment.
红外吸收峰仅在有偶极矩变化时才能实现。
Common types are dielectric moisture meter, infra-red absorption type moisture meter, etc.
常用的有介电水份计，红外线吸收式水份计等。
Moisture meter: An instrument to measure the moisture content of paper. Common types are dielectric moisture meter, infra-red absorption type moisture meter, etc.
水份计：测量存在于纸张内的水份含量的仪器。常用的有介电水份计，红外线吸收式水份计等。
The surface modification results were analysed by the methods of the specific surface area measurement and infra red absorption spectroscopy, and the best conditions for modification were obtained.
应用表面改性剂进行了氢氧化铝表面改性研究，采用了比表面积测定、红外光谱分析等测试方法对改性效果进行评价，确定了最佳改性条件。
The surface modification results were analysed by the methods of the specific surface area measurement and infra red absorption spectroscopy, and the best conditions for modification were obtained.
应用表面改性剂进行了氢氧化铝表面改性研究，采用了比表面积测定、红外光谱分析等测试方法对改性效果进行评价，确定了最佳改性条件。
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