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The outer region has multiple grooves with a high-rate path.
外部区具有带有高速度路径的多个沟槽。
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Building outer wall high temperature fire protection, sound-insulated noise reduction.
建筑物外墙高温防火、隔音降噪。
youdao
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Building outer wall high temperature fire protection, sound-insulated noise reduction.
建筑物外墙高温防火、隔音降噪。
youdao