Nkag mus rau lub sijhawm teeb tsa hom:
Rau cov timers hauv hluav taws xob, nws feem ntau yog tsim nyog tuav ib qho tseem ceeb ua haujlwm (xws li "lub sijhawm" lossis "teev rau ntawm cov zaub screen lossis cov chaw interface nkag mus.
Cov ntaub ntawv mechanical tej zaum yuav xav kom lub pob qhov rooj kom tig mus rau qhov chaw teeb tsa tshwj xeeb, xws li "teeb tsa" lossis "sijhawm".
Kho cov sijhawm thiab feeb:
Nyob rau hauv lub sijhawm teeb tsa hom, siv cov nce lossis txo cov nyees khawm (hom hluav taws xob) lossis hom pob (hom kev hloov kho cov sijhawm thiab feeb.
Feem ntau, kho cov xuaj moos ua ntej thiab tom qab ntawd cov feeb. Thaum ua kev hloov kho, them sai sai kom paub meej tias txhua tus lej raug.
