1. ์ฟผ๋ฆฌ ๋‚ ๋ฆด๋•Œ๋งˆ๋‹ค open, close ๋ฐ˜๋ณตํ•œ๋‹ค


2. ํ”„๋กœ์„ธ์Šค ์ผœ์งˆ๋•Œ openํ–ˆ๋‹ค๊ฐ€ ์œ ์ง€ํ•˜๊ณ  ๊บผ์งˆ๋•Œ closeํ•œ๋‹ค


1๋ฒˆ์ด ๋” ๋น ๋ฅด๋‹จ ๋ง๋„ ์žˆ๊ณ  2๋ฒˆ์ด ๋” ๋น ๋ฅด๋‹จ ๋ง๋„ ์žˆ๋Š”๊ฑฐ๊ฐ€ํƒ€...

์—ฌ๋Ÿฌ๋ถ„๋“ค์€ ์–ด๋–ค ๋ฐฉ์‹์œผ๋กœ ํ•ด?