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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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China Windows and Doors Manufacturers Association

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