변압기나 절연체 등에 사용되었으나 환경 오염을 유발하는 것으로 알려진 유해 화학 물질인 폴리염화 바이페닐
A group of synthetic organic chemicals known as polychlorinated biphenyls, which are persistent environmental pollutants once used in electrical equipment.
예문:
"The government strictly regulates the disposal of old electrical transformers to prevent PCB leaks."
"High concentrations of PCBs were found in the fatty tissues of fish caught near the industrial site."
전자 부품을 고정하고 회로를 연결하기 위해 전도성 경로가 새겨진 절연판인 인쇄 회로 기판
A thin board made of insulating material with conductive pathways etched onto it, used to connect electronic components.
예문:
"The technician used a magnifying glass to inspect the PCB for any broken solder joints."
"Miniaturization in electronics has led to the development of multi-layered PCBs."