بزرگترین فروشگاه کتابهای الکترونیک خارجی

Permanent Magnetism Ebook Permanent Magnetism Ebook     The 20th century has been the golden age of permanent magnetism. From the feebly magnetic iron bars and horseshoes which amused Einstein as a child to the multitude of rare-earth and ferrite magnets which are indispenable components of so many products we take for granted in our lives, the energy stored by a given magnet volume has leapt 400-fold. Permanent magnets feature in a huge variety of […]