Hais txog qhov tseeb thiab kev daws teeb meem, cov duab digital muaj qhov zoo, thiab kev ntsuas tuaj yeem pom nrog peb lossis ntau tus lej.
Analog pointers yog me ntsis qis dua nyob rau hauv qhov tseeb thiab kev daws teeb meem. Vim koj yuav tsum kwv yees txoj hauj lwm ntawm tus pointer.
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