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滤膜质量法
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滤膜质量法
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filter mass method
滤膜质量法
采集一定体积的含尘样品,将粉尘阻留在已知质量的聚氯乙烯纤维滤膜上,根据采样后滤膜的增量及采样体积,求出单位体积空气中粉尘质量的方法。
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descriptor indexing
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Desdemona
deseasonalized series
de se intepretation
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desemanticization
Desembarco del Granma National Park
desensibilization
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desensitizer
desensitizing
desert
desert and aeolian desertification discipline
desert and semi-desert faunal group of temperate zone in China
desert animal
desert biology
desert botany
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desert climatology
desert control
Desert Conttrol Research Of Shaanxi Province
desert depositional system
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