Cov rooj hluav taws xob sab hauv sab hauv tsis yog rau cov lag luam hauv qhov chaw uas lawv raug cai nyob sab hauv cov rooj sab hauv tuaj yeem muab rau kev siv hluav taws xob sab hauv tsev ib yam nkaus. Hluav Taws Kub sab hauv feem ntau muaj kev ntsuas ntawm 20, 45 lossis 60 feeb ntsuas, muaj qee qhov kev ntsuas hluav taws kub uas muaj 90 lossis 180 feeb hauv cov ntawv thov kev lag luam loj.
