The device does not work in an oilimmersion environment and has the advantages of reliable operation, convenient maintenance and stable running.
该装置不在油浸环境中工作，具有使 用可靠、便于维修、运行平稳等优点。
2
By oilimmersion coupling. the system can be used to detect near surface defects with focussing probe. find surface cracks with surface wave probe and determine defect size with computerized C-scan.