Medium-frequency DC qhov chaw vuam tshuab yog dav siv nyob rau hauv ntau yam lag luam, xws li kev tsim tsheb, kev tsim kho, thiab hluav taws xob. Lawv muaj peev xwm vuam tau zoo thiab meej, tab sis kev nyab xeeb yog qhov tseem ceeb thaum ua haujlwm ntawm cov tshuab no. Hauv tsab xov xwm no, peb yuav tshawb txog qhov tseem ceeb ...
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