lossis

HDSM

hluavtaws chrysoberyl hdsm

Khoom cua chrysoberyl - HDSM

Synthetic chrysoberyl Cov ntxhia lossis pob zeb chrysoberyl yog aluminate ntawm beryllium nrog tus qauv BeAl2O4. Lub npe chrysoberyl los ntawm ...
Nyeem ntxiv
kev ua yuam kev: Cov ntsiab lus yog kev tiv thaiv !!