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Kawm txog Bismuth
Bismuth yog ib hom hlau dawb dawb mus rau xim liab uas yooj yim tawg thiab yooj yim rau kev zom. Nws cov khoom siv tshuaj lom neeg ruaj khov. Bismuth muaj nyob rau hauv xwm hauv daim ntawv ntawm cov hlau dawb thiab cov zaub mov. 1. [Xwm] Bismuth ntshiab yog ib hom hlau mos, thaum Bismuth tsis huv yog brittle. Nws ruaj khov ntawm chav tsev kub....Nyeem ntxiv
