1.It is made of high qualified steel plate (aluminum) rolling forming, not filled with middle carbon fluorinated compounds of polyurethane foaming materials, heat insulation, sound insulation, heat preservation.
2.in the process of start, very swift and no noise, if use motor drive, power changed hands move way can be met.
3. using high quality materials, sophisticated production technology and production technology, meet slight collision after can sprung automatically deformation.
4. the closed beta guide drive, promoting a door with other than to save the building, the internal space, installation is more convenient.