英语翻译

题目

英语翻译
风管制作好后,应在安装前进行清洁,并对空调器内部进行清洁,再将风管安装,与空调器连接,再安装初效,中效后,对洁净室内进行清洁,空调运行一段时间后,再对洁净室进行清洁,最后安装高效.
我是对这种一些列动作的语句 晕乎啊,这么断句,这么架构句子.
after the making of ductwork is completed,it should be cleaned prior to installment,so does the inside of AHU.The ductwork should be connected with AHUs after installment,then following the installment of primary filter and middle filter.When the clean rooms are cleaned,run the AHU for a while,then reclean the rooms and finally install the HEPA.
这是我翻译的，

答案

Installation,not installment