ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ

http://jasperditj185.aircus.com/7-things-about-youll-kick-yourself-for-not-knowing

It's been a long time since we went over security doors, so we thought it was due time for a refresher. Let's begin by advising ourselves what they are and why we need them. What is a security door, and why do