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The width of the frame is 70mm, and the thickness of the section is 2.0mm.
The border connection is connected by 90 degrees of tenon and mortise.
You can do single open fan + fixed, double open fan, double open fan + double fixed and many other ways.
Glass notch (non pressure line) single glass width 12mm, hollow notch width 23mm;
The width of the narrow door fan is 30mm, and it is economical and practical.
0.9m x 2.2m standard gate per square consumable 6.176g;