ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ

http://b3.zcubes.com/v.aspx?mid=1150189&title=the-biggest-problem-with---and-how-you-can-fix-it

It's been quite a while since we discussed security doors, so we thought it was about 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