Nyob rau tib lub sijhawm, ntau yam khoom siv tau ua los ntawm cov hlau rau kev tiv thaiv electromagnetic cuam tshuam (EMI), tab sis kev txav mus rau yas muaj lwm txoj hauv kev. Txhawm rau kov yeej qhov tsis muaj zog loj tshaj plaws ntawm cov yas hauv attenuating electromagnetic cuam tshuam, tsis muaj hluav taws xob conductivity, engineers ...
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