Yav dhau los, cov ncej puab qab rooj yuav tsum tau welded artificially, lub zog wel plees, nws yuav yog ib qho teeb meem kom sib sau ua ke lub khob insulated zoo. Qee zaum nws yuav ua rau insu
Peb txaus siab heev rau ob qho tib si ntawm cov neeg siv khoom tus cwj pwm thiab cov khoom lag luam. Cov khoom tau xa khoom sai sai thiab ntim kom zoo zoo thiab nruj.
Lub tuam txhab muaj lub zog muaj zog thiab lub koob npe zoo. Cov khoom siv tau muab tus nqi ua tau zoo. Tseem ceeb tshaj plaws, lawv tuaj yeem ua tiav txoj haujlwm hauv lub sijhawm, thiab tom qab kev pabcuam muag khoom yog qhov chaw.