There is a conference between different types of materials, metallurgy, gray, and types of earring making

There is a conference between different types of materials, metallurgy, gray, and types of earring making In date 2025-07-21 by ,پژوهشگاه آموزش و تحقیقات مهندسی انجمن تعاون ایران in City Tehran was held. please refer to the following link to download all the papers of conference proceedings: Proceedings There is a conference between different types of materials, metallurgy, gray, and types of earring making