์ฟ ํฐ ๋จน์ด๊ณ  ํ† ์Šคํ•˜๋‹ˆ๊น 4.0

๋‚˜์˜ค๋Š”๋ฐ ๋„ˆ๋ฌด ์‹ผ๊ฑฐ ์•„๋‹˜?