ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ ΑΘΗΝΑ
https://knoxzfxq342.hatenablog.com/entry/2019/07/10/063836
It's been quite a while since we went over security doors, so we thought it was due time for a refresher. Let's begin by reminding ourselves what they are and why we need them. What is a security door, and why