Opto-Edu ali ndi kasitomala wakale wochokera ku Denmark kwazaka zopitilira 15, kuyitanitsa mitundu yama microscope ya 30 kwanthawi yayitali, kugulitsa voliyumu yopitilira ma 1000 mpaka ma PC 1500 chaka chilichonse. Ngakhale dongosolo lililonse silili lalikulu kwambiri, koma popeza limakhudza mitundu yambiri, kasitomala ali ndi zofunikira zambiri pazosindikiza, utoto, kulongedza ...
Werengani zambiri