(1) Qhov kev ua tau zoo nyob rau hauv kab GB9770;
(2) hais txog kev ua kom zoo ntawm cov neeg siv yas muaj kev tshwj xeeb, thov hu rau peb;
(3) Yam mob uas tsis muaj zog tiv taus dua tuaj yeem ua rau kom muaj zog tuaj yeem ua rau muaj li 1 mus rau 2 zaug, yauv dua li 0.5 rau 1 zaug;
(4) txias hom yam tsawg kawg ntawm kev khiav hauj lwm kub ntawm -60 ℃.
