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                                                         Abstract


                                                (บทคัดย่อภาษาอังกฤษ)




                The purpose of this project is to reduce pm2.5 dust in the classroom, there are methods of
                 searching for information, finding equipment, starting to do quality testing. The experiment

               was summarized by using boxes of different sizes to light incense and turn on the air purifier.
                    Reworking the box to a little more than before. The results of the study and project

                preparation found that we should divide the work in keeping people free because the work

                 will move and everyone will have a job and our purifier can filter dust pm 2.5 to 0 per
                 cubic meter. In doing this project, this project is successful because our group's air purifier

                can filter pm2.5 dust to 0 micrograms per cubic meter in the area size. It is a place that is

                                                     small like a car.
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