The ducting hose end set funnel indraft cover use in ventilator installation. The ducting hose else end set discal air exit of power and heat supply set installation.
所述导风管的一端设有供排风扇安装的斗状吸风罩口，导风管的另端设有供电热装置安装的盘状排风口，斗状吸风罩口与盘状排风口相对应；
The ducting hose end set funnel indraft cover use in ventilator installation. The ducting hose else end set discal air exit of power and heat supply set installation.
所述导风管的一端设有供排风扇安装的斗状吸风罩口，导风管的另端设有供电热装置安装的盘状排风口，斗状吸风罩口与盘状排风口相对应；
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