门框内侧预装有密封条，隔声效果及密封性提高。
The inner door of the door is sealed with a sealing strip, and the sound insulation effect and the sealing performance are improved.
门框内侧预装有密封条，隔声效果及密封性提高。
The inner door of the door is sealed with a sealing strip, and the sound insulation effect and the sealing performance are improved.
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