@article{article, title = {{Evaluation of an ultrasonic method for measurement of oil film thickness in a hydraulic motor piston ring}}, url = {{http://eprints.whiterose.ac.uk/9182/ }}, year = {{2005}}, month = {{1}}, author = {{Harper P and Dwyer-Joyce RS and Sj枚din U and Olofsson U}}, doi = {{10.1016/s0167-8922(05)80032-x}}, volume = {{48}}, journal = {{Tribology and Interface Engineering Series}}, pages = {{305-312}}, note = {{Accessed on 2025/08/26}}}