[자료 링크]
https://www.evernote.com/shard/s252/sh/54729fbd-ea5c-736e-5724-65547e937a3c/c35d3c3dc58f68b1369f213c93ec54eb

제약된 공간에 설치되는 우편함을 보면 우편물이 지저분하게 꽂혀 있고, 관리가 안 되고 있음.
같은 공간에 설치되는 우편함이라도 구조를 달리하면 우편물의 관리 및 미관상 느낌이 전혀 다르다는 것을 알 수 있음.