General Science- Whilhelm rontgen Ne Avishkaar Kiya Tha ?

Q.12802: विल्हेल्म रॉन्टजेन ने आविष्कार किया था ?
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विल्हेल्म रॉन्टजेन ने आविष्कार किया था ? - Wilhelm Röntgen invented? - Whilhelm rontgen Ne Avishkaar Kiya Tha ? General Science in hindi,   X - Re Machine Ka question answers in hindi pdf  Vidyut Bulb Ka questions in hindi, Know About Radion Ka General Science online test General Science notes in hindi quiz book    Vidyut Motor Ka