Tus qauv tsim sib xyaw ua ke txuag tau 30% ntawm qhov chaw hauv pem teb piv rau cov qauv ib txwm muaj thiab txhawb nqa kev ua haujlwm sib luag ntawm ntau chav. Nws yog qhov tsim nyog tshwj xeeb rau kev kho dua tshiab ntawm lub Hoobkas thiab kev txhim kho cov kab ntau lawm uas tsis muaj chaw ntau, tshem tawm qhov xav tau tshiab.lub tshuab cuachaw nres tsheb.
Cov thev naus laus zis ob theem xaiv tau muab kev txuag hluav taws xob ntxiv 15% piv rau cov qauv ib theem. Nws cov yam ntxwv tseem ceeb ntawm kev txuag hluav taws xob tau ua rau nws siv dav hauv cov xwm txheej siv hluav taws xob ntau xws li lub zog tshiab thiab kev tsim khoom hnyav.