ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ ΑΘΗΝΑ
https://knoxzfxq342.hatenablog.com/entry/2019/08/19/220015
It's been quite a while considering that we went over security doors, so we thought it was due time for a refresher. Let's start by reminding ourselves what they are and why we need them. What is a security door,