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آذار هو الشهر الثالث 3 من شهور السنة الميلادية حسب الأسماء العربية . 13 آذار (مارس) 2015 المتحدة، وكان يستخدم على نطاق عالمي واسع في مجال التعدين وبناء شبكات النقل . of Muhammad perhaps even dictated by him after their recitation"< ref> عالية Watery وهذا ...
Fluorite Wikipedia. Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the ... It is recorded that interest in the commercial mining of fluorspar began in 1928 with the first ore being extracted in 1933. ... falling back of the electrons into their previous energy state, releasing quanta of visible light in the process.
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