6、钣金加工选择硬件型号，规格，功能必须符合国家的标准和规定，并与 PVC 门窗的选择相匹配。
1, the warning lamp closes in the use process open.
2, sliding windows are more than one meter wide or double glazed doors and windows set up a double pulley.
3, the installation of metal stamping parts to prevent rust and corrosion after regular maintenance.
4. The door lock of the window is assembled by the door lock. To make sure that it is correct, the switch needs to be flexible.
5, the installation of fastening screws must be set in metal lining, the thickness of the lining is two times the hardware of the fastener golf course.
6, the choice of hardware type, specification and function of sheet metal processing must conform to the national standards and regulations, and match with the choice of PVC doors and windows.