Analysis on the Application of Polyamide (PA) Materials to Replace Existing Materials in Hair Dryer Housings April 2023 in “ Highlights in Science, Engineering and Technology ” Congyu Ning We don't know much about this study yet. We're maintaining the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on drpress.org →