TY - JOUR T1 - Evaluation of an ultrasonic method for measurement of oil film thickness in a hydraulic motor piston ring JO - Tribology and Interface Engineering Series UR - http://eprints.whiterose.ac.uk/9182/ PY - 2005/01/01 AU - Harper P AU - Dwyer-Joyce RS AU - Sj枚din U AU - Olofsson U ED - DO - DOI: 10.1016/s0167-8922(05)80032-x VL - 48 SP - 305 EP - 312 Y2 - 2025/03/17 ER -