Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
이 저항성의 재료는 전기를 잘 통하지 않습니다.i jeohangseong-ui jaeryo-neun jeon-gireul jal tonghaji anhseubnida.This resistive material does not conduct electricity well.