Costa Rica cov neeg tawm tswv yim
Si-901 yog qhov khoom muag tshaj plaws hauv lub ntiaj teb, nrog rau kev siab tshaj plaws ntawm cov xuab zeb tswj, kev tswj kev tiv thaiv, ci ci, hydrophobicity thiab durability.
Peb yog lub Hoobkas muag, qhov qis kawg nkaus kom muaj nuj nqis yog 34 fwj, kom tau raws li txhua hnub cov kev xav tau ntawm lub khw muag khoom.
