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원단의 방향. 식서 푸서 바이어스
: th-cam.com/video/O5ojLn4kWwQ/w-d-xo.html
바이어스재단. 사선잇기
: th-cam.com/video/4S8aezEae9Y/w-d-xo.html
바이어스 기본감싸기(직선)
: th-cam.com/video/ZeHLF-20PEE/w-d-xo.html