01 Flexible Flat hauv qab Hnab Rau Qhuav Ntsws Ntim
• Cov hnab hauv qab tiaj tiaj rau ntim cov txiv ntoo qhuav, yooj yim rau pawg, yooj yim rau cov khw muag khoom thiab cov neeg siv khoom; • Ntau txheej txheej zaj duab xis, ntxiv dag zog rau kev tiv thaiv kev ya raws, oxygen, ultraviolet rays ...
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