Dab tsi yog sab nraum zoov optical cable
Sab nraum zoov kho qhov muag cable, uas yog tsuas yog hais tias yuav siv sab nraum zoov, belongs rau ib hom ntawm optical cable. Nws yog hu ua sab nraum zoov kho qhov muag cable vim nws yog qhov tsim nyog rau kev siv sab nraum zoov. Nws yog ruaj, muaj peev xwm tiv taus hnub nyoog ...
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