English Arabic أنبوب تفريغ مملوء بغاز الكريبتون ومصمم على هيئة رمز هذا العنصر الكيميائي Kr...
Gas discharge tubes showing a spectral range of colors from the noble or inert gases - helium (He), neon (Ne), argon (Ar), krypton (Kr) and xenon (Xe)...
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