Door or windows systems extendable into wide areas; when extended, the view is not divided; having two sashes. One sash turns towards right, other towards left. The one closed first and then opened is called the passive sash. Passive sashes work like turn only windows.
They have differences according to their fixing styles. Different applications such as cartridge sliding, double armed, adapter espagnolette are available. Active sash can be operated with any one of the PVC door and windows applications as per request. It will be useful to make the part which will be used more active.
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