1. 75 degrees yog qhov kub tshaj plaws. Txhua zaus nias lub khawm hloov kho qhov kub thiab txias, cov txheej txheem hloov pauv los ntawm 5 degrees thiab cycles ntawm 30 thiab 75 degrees. Piv txwv li, rau qhov qub 75, nias ib zaug hloov nws mus rau 30 degrees, nias dua hloov mus rau 35 degrees, nias dua hloov mus rau 40 degrees. Koj tuaj yeem teem nws rau qhov xav tau kub raws li qhov no. Hauv 3 vib nas this, tsis muaj khawm ua haujlwm ntxiv. Tom qab 1 thib ob, lub kaw lus cia li lees paub tias qhov kub thiab txias yog qhov kub thiab txias, thiab cov zaub tau rov pib ua kom pom cov dej kub tiag tiag.
2. Yog tias qhov sib xyaw valve tau teeb tsa thiab ntau tus neeg yuav tsum tau da dej tsis tu ncua, nws raug nquahu kom tsis txhob teeb tsa qhov kub thiab txias, xws li 55 degrees, 60 degrees, lossis 65 degrees. Yog tias tsis muaj qhov sib tov sib xyaw thiab tsuas yog ib tus neeg siv nws, 45 degrees tuaj yeem teeb tsa.