Besides the element parts of a fan, it specially has a cone filtering net, a dust collecting cover and a dust collecting bag.
它的外型类似于离心风机，除了主要的风机部件外，还有其独特的锥形滤网、集灰罩和集尘袋。
2
FFU laminar flow unit is an air filtering and purifying unit with its own blower fan, it comprises of primary efficiency filter, blower fan, high efficiency filter and static pressure box.
FFU层流罩是一种自带风机的空气过滤净化单元，它由初效过滤器、风机、高效过滤器和静压箱组成。
3
Its outline looks like a centrifugal fan. Besides the element parts of a fan, it specially has a cone filtering net, a dust collecting cover and a dust collecting bag.