检查MAU的初中效过滤器，当压差报警时对初效过滤器进行清洁或更换；
公司主要产品有初效过滤器、中效过滤器、高效过滤器，以及活性碳空气过滤器。
Company's main products are the early effect filter, in effect filter, high efficiency filters and activated carbon air filter.
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。
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.
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