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2021-06-14 11:00:32
00:38:34
Urdu
x-rays properties types x-rays and atomic number Moseley Law Uses class 11 chapter 2 Chemistry kpk text book punjab text book balochistan text book sindh text book tariq pathan
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Tariq Pathan Science Academy
Class 11 Chapter 2 - X-Rays & its types | Mosely Law explained by Tariq Pathan