Cov khoom ntim hauv cov qhov rooj ntoo yog cov tsis muaj tshuaj lom thiab ib puag ncig-phooj ywg hluav taws kub thiab thermal rwb thaiv tsev cov ntaub ntawv, xws li rosewood, walnut thiab ntoo qhib. Cov txheej txheem hluav taws kub tsis zoo muaj qhov ua tau zoo heev thiab kim heev.

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