م مقاله کنفرانسی سال ۱۳۹۸ ۶۱۲ مشاهده Study of Ultrasonic Welding of Glass Fiber Reinforced Thermosetting Epoxy-based Polymers This paper presents the preliminary results of ultrasonic welding of epoxy based thermosets by thermopla… PVCPMMAUltrasonic welding