ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ

http://martinbguq503.yousher.com/10-inspirational-graphics-about-portes-asfaleias-times

It's been a long time because we went over security doors, so we thought it was high time for a refresher. Let's start by reminding ourselves what they are and why we need them. What is a security door, and why