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Inorganic chemicals
A broad class of substances encompassing all those that do not include carbon and its derivatives as their principal elements, yet not excluding carbides, carbonates, cyanides, cyanates, and carbon disulfide.
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Inorganic chemicals > 
歐文斯塵記錄儀
Weather; Meteorology
一種儀快速獲得樣品的空氣中粉塵 ；塵埃計數器的類型。粒子通過圓柱的會議廳和高速度通過窄縫前面的顯微鏡蓋玻璃上繪製。脹的空中穿過狹縫原因在玻璃上的灰塵堅持的水分膜形成壓力下降。上蓋玻璃微粒的大小和數量分析由顯微鏡的援助。營運該文書中所需的真空是由一個附加的手泵開發的。 ...
