shamsi tawanai ki technology behtar bananay ki koshish
shamsi tawanai ki technology behtar bananay ki koshish bijli ke bohraan ke sabab kayi logon ko pareshani ka saamna karna parta hai. is maslay ko hal karne ke liye science daan nnat nai cheeze bana rahay hain. guzashta saal England ki aik tajurbah gaah mein mohqiqeen ne shamsi tawanai se chalne walay lamp ko aik … Read more