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英国铁路公司（BR）已研制成功一种自行式钢轨探伤车（UTU），可以70km加的运行速度对铁路线路上钢轨进行超声波探伤。其结构设想是基于BR公司所研制的作业方式新颖的滚轮式超声波探头。从1992年4月份开始，该机组已经由BR公司工务部门材料工程组投入运用，并承包了对InterCity
British Railways (BR) has successfully developed a self-propelled railcar (UTU) that can perform ultrasonic flaw detection of rails on railway lines at an operating speed of 70km. Its structure is based on the BR company developed a new method of operation roller ultrasonic probe. From April 1992 onwards, the unit has been put into operation by BR’s engineering department materials engineering group and contracted to InterCity