Lub qhov rooj kub 90 feeb yog dab tsi?

Cov qhov rooj no tuaj yeem tiv thaiv tau 90 feeb ntsuas hluav taws thaum dai rau hauv cov kab sib cais hlau thiab tau ntsuas nrog nruab nrab siab daim ntawv lo. Lub pob khawm thiab tawm tsam cov chaw tsim mus rau hauv lub qhov rooj match therma-tru cov qauv txheem puv loj, lossis phau ntawv loj me, specifications.