1. Carefully turn off and turn on in the process of application.
2. Fastening screws shall be applied to the hardware of the device, and a metal lining plate shall be set inside. The thickness of the lining plate shall be greater than 2 times of the spacing of the fastener teeth.
3 hardware stamping parts after the device to do a good job of regular care, to avoid rust and corrosion.
4. Door door lock handle should be in the reassembly after window door fan enters a frame. The position should be accurate and the switch should be sensitive
5. The width of the sliding window exceeds more than one meter or the doors and Windows of double glass should be set up with double pulleys.
6. Slip hinge is made of stainless steel.
7. In the model that chooses hardware fittings, specification, function should agree with the standard of a country and concerned rules, and should match with the photograph of window of model steel door that chooses.
