03고다은_통신 수단(전화)의 발달 조사하기 by 고다은 https://padlet.com/21g3203/cbzl4csy14zke9zs en-us 2021-06-17 02:09:08 UTC 2025-10-25 23:21:30 UTC hello@padlet.com 1번째 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611276503 교환원이 있는 전화
         _설명_
교환원이 있는 전화는 교환원이 그 전화를 건사람이 원하는 곳으로 전화를 연결시켜준다.]]> 2021-06-17 02:16:11 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611276503 2번째 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611281475 유선전화
              _설명_
유선전화는 전화기에 선이 달려있어서 들고다니기가 어렵다.

]]> 2021-06-17 02:18:28 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611281475 3번째 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611291057 무선 전화
                 _설명_
무선전화는 유선전화기처럼 선이 달려있지 않아서 주머니에 넣고다닐수 있다.]]> 2021-06-17 02:23:00 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611291057 4번재 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611295474 스마트폰
               _설명_
스마트폰은 무선전화기처럼 들고다닐수 있고 영상통화,매시지도 할수있다.]]> 2021-06-17 02:25:12 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611295474 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611334685 2021-06-17 02:45:39 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611334685 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611343735 2021-06-17 02:50:14 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611343735 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611361551 2021-06-17 03:00:08 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611361551 21g3203 https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611366455 2021-06-17 03:03:03 UTC https://padlet.com/21g3203/cbzl4csy14zke9zs/wish/1611366455