ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ

http://q3pcjsc070.nation2.com/watch-out-how-928927929932917931-913931934913923917921913931-932921924917931-is-taking-ov

It's been quite a while because we went over security doors, so we believed 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