01
Qhov chaw nres tsheb capping yog ib qho tseem ceeb ntawm lub tshuab luam ntawv, thiab nws lub luag haujlwm tseem ceeb yog los tiv thaiv lub nozzle. Thaum lub tshuab tsis siv sijhawm ntev tom qab nres, lub nozzle yuav nyob twj ywm ntawm tus number case, yog li tiv thaiv kom tsis txhob txhaws los ntawm tus number case condensation ntawm lub nozzle.