TY - GEN AU - Mornis, M A AU - Quinn, T P AU - Siewert, T A AU - Steele, J P H C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1992-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.3996 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1992 TI - Sensing of contact tube wear in gas metal arc welding: ER -