Laminar flow hood with an externalfan mounted, side mounted fans to upload and fans of three, the installation methods are hanging, floor and mobile are three.
层流罩有风机外接装、风机上装和风机旁装三种，安装方式有悬挂式、落地式和移动式三种。
3
PIV experiment is carried out on certain axial fan with and without external duct.