适用范围
矩形薄钢板法兰风管适用于中、低压通风及空调工程中的送、排风系统（含
空调净化系统）。风管长边尺寸一般为2000mm 以下。超出此规格尺寸的风
管，可采取加固措施。
Scope
Rectangular thin steel plate flange duct suitable for medium and low pressure ventilation and air conditioning project delivery, exhaust system (including
Air purification system). Duct size is generally 2000mm long side of the following. Wind size beyond this size
Tube, reinforcement measures can be taken.