Raws li cov khoom tseem ceeb ntawm kev siv tshuaj pleev ib ce, cov txheej txheem ntau lawm, thiab nkag siab txog cov khoom siv cream, thiab cov neeg siv khoom lag luam ntawm cov khoom lag luam thiab cov neeg yuav khoom.
Kev tsim cov raj mis cream feem ntau pib nrog kev xaiv cov khoom siv raw, lawv tau tsim kom yooj yim thaum lub sij hawm lub taub hau siab los ntawm kev ntsuas lub raj mis tsis yooj yim, kom cov txheej txheem siab tshaj plaws los ntawm kev tsheb ciav hlau lossis nias cov txheej txheem ntawm cov txheej txheem yog tsim nyog rau me me thiab nruab nrab fwj, siv cov cua compressed los tshuab iav molten rau hauv cov duab uas xav tau; Cov txheej txheem nias yog qhov tsim nyog dua rau cov fwj loj lossis cov pob zeb loj, uas tau nias ncaj qha rau hauv cov duab los ntawm pwm.
Cov txheej txheem tsim lub raj mis tso rau sab hauv kev ntxhov siab thiab ua kom muaj kev sib cav sib ceg khoom .
Luam ntawv thiab cim npe yog cov kauj ruam tseem ceeb tshaj plaws {}}} Tus qauv siv tshuab hluav taws xob muab cov khoom siv kub ntxiv rau cov khoom kim heev ntawm cov khoom kim heev.
Thaum kawg, cov iav fwj yuav tsum dhau qhov ntsuas nruj nruj, suav nrog kev tshuaj xyuas cov qauv hauv kev puas tsuaj rau kev puas tsuaj thaum kev thauj mus los.
Nrog kev nce ntawm ib puag ncig kev paub, qee cov tuam txhab tau pib siv cov tshuaj pleev ib puag ncig, ib puag ncig los ua kom tau ntau yam kev xav tau ntawm kev lag luam thoob ntiaj teb {}}
