Inorganic chemicals

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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二次曲線的直徑

Earth science; Mapping science

線段加入二次曲線的兩個點和二分的平行弦的家庭每個成員。

衍射光柵

Earth science; Mapping science

(這會將衍射經過思考或線之間傳輸時的電磁輻射精確間距、平行線 1) 一套。(2) 金屬或其它材料，導致衍射的直紋的片。衍射光柵的無線電波通常包括密絲框架中舉行。衍射光柵從紅外到紫外波段的輻射統治的 graving 工具上的平面或曲線的表的金屬，或可能產生的拍攝到玻璃板上的油墨紙上的行集。在很短的波長的晶體格作為衍射光柵。 ...