현경찬_통신수단(전화)의 발달 조사하기 by 현경찬 https://padlet.com/21g3224/841zw21p115yl9vg en-us 2021-06-17 02:18:02 UTC 2024-06-28 05:28:59 UTC hello@padlet.com 처음으로 만들어진 전화기 21g3224 https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611284661 처음으로 만들어진   전화기는 교환원이있는 전화]]> 2021-06-17 02:19:58 UTC https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611284661 그다음 으로 만들어진 전화 21g3224 https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611304707 그다음 으로 만들어진 전화는 유선전화다
설명:유선전화는 선이있는 전화다]]> 2021-06-17 02:30:05 UTC https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611304707 21g3224 https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611323439 2021-06-17 02:40:02 UTC https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611323439 그다음으로 만들어진 전화 21g3224 https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611328211 무선전화는 선이없어서 전파를 통해 한다]]> 2021-06-17 02:42:30 UTC https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611328211 그 다음으로 만들 어진 전화 21g3224 https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611337810 스마트폰도 전파로한다
무선전화와 다른점:]]> 2021-06-17 02:47:14 UTC https://padlet.com/21g3224/841zw21p115yl9vg/wish/1611337810