1. Taw qhia Neodymium hlau nplaum, raws li cov khoom siv hlau nplaum ruaj khov, muaj txoj haujlwm tseem ceeb hauv cov cuab yeej siv niaj hnub thiab kev lag luam vim nws cov khoom tshwj xeeb thiab kev siv ntau yam hauv ntau hom, xws li disc, lub tog raj kheej, arc, lub voos xwmfab thiab lwm yam. Tsab ntawv no ...
Nyeem ntxiv