Why should the window frame in the wooden window on the side of the slot
This production process can not only ensure that the installation of fast, perfect, but also to ensure that the thickness of the wall is not standard or when the measurement is not accurate, through the small ears inserted into the depth of the adjustment.
Wooden doors and windows frame wall side of the slot is to make sets of small ears can be inserted into the installation, Opel Long door industry company's door and window sets is this production process
I think you should buy your door and window sets of lines for the L-type, this set of lines with a side of the 1 to 2 cm wide ears
