luv luv piav qhia:

Copper foil daim kab xev muaj kev ua tau zoo ntawm kev txuag hluav taws xob, rwb thaiv tsev kub, tsis muaj dej, tiv thaiv txias, yooj yim los tsim kua muag, tuaj yeem tshem tawm cov kev cuam tshuam ntawm electromagnetic, cais cov teeb meem ntawm electromagnetic tsis rau tib neeg lub cev, thiab zam kev ua haujlwm ntawm qhov hluav taws xob lossis tam sim no. Nws yog tsim rau txhua yam ntawm machinery, xov hlau, jacks, thiab motors.