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Factory price different size Bi-folding interior folding doors/Aluminum vertical folding windows on China WDMA
Bi-folding interior folding doors/Aluminum vertical folding door product properties Rust grades ST2 Sealing EPDM or hairbrush Opening Speed 6-9m/min Running Temperature -40℃---70℃ Operating System SIEMENS PLC or DEMAG Window Material Tempered Glass Sound Insulation more than 40dB Air Tightness 2.5m3/L-h Seismic Fortification Intensity 8 degrees Electrical Cabinet Protection Grade IP55...
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