महान आविष्कारक हीरो : हिंदी पीडीऍफ़ पुस्तक – बच्चों की पुस्तक | Mahan Aavishkarak Heero : Hindi PDF Book – Children’s Book (Bachchon Ki Pustak)
Pustak Ka Vivaran : Sophy ke saval se mahila kafi prasanna dikhi. “Chalo us stikar ne logon ko sochane ke liye to mazboor kiya,” Mahila ne samjhaya. “kayi log sochate hain ki hamane keval hal hi mein masheenon ka aavishkar karana shuru kiya hai. Lekin hamare dvara upayog ki jane vali kayi machinen 2,000 sal pahale avishkar huyi theen. Alexandria ke prachin greek aavishkarak heero ne aise……..
Description about eBook : The woman looked very happy with Sophie’s question. “Let’s make that sticker make people think,” the woman explained. “Many think that we have only recently started inventing machines. But many of the machines we use were invented 2,000 years ago. The ancient Greek inventor of Alexandria, Hero …….
