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  • Sound insulation door
    Sound insulation door
    2018-06-25
    The sound insulation door is made up of door and door frame. It is a kind of high quality cold rolled steel plate, cold processing and processing. The inside of the door is filled with sound absorption cotton, PU, honeycomb structure, sound insulation material (sound insulation material is mainly damped rubber plate, mineral cotton sound insulation board). It adopts advanced technology, unique design and special seal making process. Double cutting method, with fire, sound insulation, h
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