... production efficiency, low nonconformities. Company information:(pvc pipe ultrasonic welding machine)Zhuhai LK-Automatic Technology Co., Ltd. was ... of the pvc pipe ultrasonic welding machine Plastic Guardrail tube sealing machine, LED guardrail tube welding machine, parapet light welding ... equipment, guardrail tube double-head sealing and welding machine also has audio wave forms in the plastic ...