TY - CONF T1 - On-line measurement of lubricant film thickness using ultrasonic reflection coefficients JO - REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 23A AND 23B PY - 2004/01/01 AU - Drinkwater BW AU - Dwyer-Joyce RS AU - Harper P ED - Thompson DO ED - Chimenti DE VL - 23 SP - 984 EP - 991 Y2 - 2024/12/23 ER -