Cov ntsiab lus | Square iav Magnets |
Muag Cov Ntsiab Lus | Txaus nyiam thiab tsim nyog tus nqi ntawm cov square iav hlau nplaum |
Nta | Square zoo, me me rau kev siv yooj yim, cov ntsiab lus nrov |
Kev siv | Sib nqus adsorption |
Tsis muaj | 30 hli |
Daim ntawv pov thawj |