愚人彩票

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                镀锌螺旋风管-3

                镀锌螺旋风管-3

                不锈钢风管▲的制造高度自动化,生↓产速度很快,一般的风管每分钟能生产20~40米,由于其原材料镀锌带钢与整张镀锌钢板相比,价格较低,加上其工厂化生产和规格的标准化,使得风管的造价要比矩形风管低;另外由于其支、吊架需☆量少☆,安装工作量少,所以风管的总成本较低。由于矩※形风管的四角易产生湍流,减少【了有效通流面积,空气流动性好,有效通ω流面积大,所以□ 风管的二次噪声小,由于风管的强度大,因此风管振动引起的低∴频噪声更小,空气流动性『能好,系统压降小,日常运行系统耗电量▼


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