Hluav taws xob ib feem ntawm pre-evacuated box furnace:

Cov khoom siv hluav taws xob tau txais cov qauv kev sib xyaw ua ke nrog lub tshuab ua kom sov lub cev, thiab tag nrho cov khoom siv hluav taws xob tau nruab rau ntawm ib sab ntawm lub tshuab hluav taws xob lub cev, nrog rau cov qauv compact thiab chaw ua haujlwm me me. Lub ntsuas kub tswj tau nruab rau ntawm sab vaj huam sib luag ntawm lub tshuab ua kom sov lub cev rau kev soj ntsuam zoo thiab kev hloov kho yooj yim. Lub tshuab ntsuas kub muaj PID hloov ua haujlwm, uas tuaj yeem taug qab thiab teeb tsa tus nqi PID zoo tshaj plaws, thiab tuaj yeem teeb tsa qhov ntsuas ntsuas ntsuas tus password ntawm qhov xav tau. Nyob rau tib lub sijhawm, nws muaj kev them nyiaj ua haujlwm.