In the construction and especially when the object is in the phase of closing, the constructor workers are using so many words to install the simple door or window, that is amazing. Believe it or not, there are so many elements included at the doors or windows which makes them functional. 
We all know there are many different types of doors or windows, that are visually making the difference, and now imagine the installation elements they all use so they do their job well. The gallery will present you several of each type, together with the names of the elements on them. Take a look and learn!
...