What is the combination of the door, what is the combination window, what is his definition?
More secure, more reasonable, more durable
The main features of the combination door, combined window are multi-fan combination, one-time installation.
And the main difference between ordinary doors and windows is a combination of complete sets of installation, ordinary doors and windows is the first fixed box after the fan.
Now the steel window and aluminum window is a combination of windows, but people have not only from the industrial plant has a combination of windows in the concept of change out.
There are many types of combination doors, a few pictures for you to understand.
