Fans shall include housing, fan wheel, shaft, bearing, diffuser section, motor mounting support, and mounting frame as a factory assembled unit, belt drive, belt guard, and motor slide rail.

• 风扇包括由厂家成套提供的机架、轮子、轴、轴承、散风件、马达安装支柱和安装架，以及驱动带、护档和电动机滑轨。