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β射线法大气颗粒物监测仪
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β射线法大气颗粒物监测仪
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β射线法大气颗粒物监测仪
释
β-ray method atmospheric particulate monitor
β射线法大气颗粒物监测仪
测量β射线穿透采样滤膜后的衰减量来反演滤膜上沉积颗粒物质量的仪器。测量结果不受尘粒的形状、大小、光折射率等特性影响。
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evaluation for structural state
evaluation function
evaluation function method
evaluation functor
evaluation grade of urban greening
evaluation index of animal derived food contamination
evaluation index of safety production
evaluation index system
evaluation index system for cultivated land fertility
evaluation index system of agricultural system
evaluation index system of network public opinion
evaluation indicator of NIST
evaluation mapping
evaluation method of feed nutritional value
evaluation method of forestry technical economy
evaluation method of investment project
evaluation methods combination
evaluation model
evaluation mode/model
evaluation object
evaluation of adaptation to climate change
evaluation of agricultural extension
evaluation of agricultural meteorology condition
evaluation of airborne magnetic measurement quality
evaluation of air quality
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