Xov Xwm Tuam Txhab
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Hlau Calcium Cored Hlau Khoom
Cov khoom siv calcium hlau cored hlau feem ntau yog qhwv cov calcium hlau nrog sawb hlau, siv cov txheej txheem kev sib txuas ntawm cov hlau tsis muaj dej, ua kom zoo zoo, nruab nrab zaus annealing, thiab xaim nqa lub tshuab thaum kawg tsim ...Nyeem ntxiv
