TY - GENERIC DO - 10.20944/preprints202406.1778.v1 UR - http://dx.doi.org/10.20944/preprints202406.1778.v1 TI - The Sealing of Copper Pipes by Ultrasonic Welding for Heat Pump and Refrigeration Applications T2 - Preprints AU - Pereira, António B. AU - Batista, Joana D. AU - Silva, Nélia M. AU - Mascate, Bernardo PY - 2024 DA - 2024/06/25 PB - Preprints