Lub qhov rooj hluav taws raws li cov ntaub ntawv hauv cov ntaub ntawv feem ntau muaj 4 pawg hluav taws xob: Cov Hluav Taws Hlau, Hlau Hluav Taws, Lwm Qhov Rooj Hluav Taws Xob, Lwm Cov Khoom Hluav Taws Xob. Ntawm lawv, iav thiab stainless hlau txhua tus muaj rau lwm cov khoom siv hluav taws.
