| 摘要 |
The expansion device (1) comprises an elongate body of revolution (4) surrounded by an annular member (17) which can be expanded using a pressurised hydraulic fluid, and means for measuring the expansion, which are arranged on the body (4) and surrounded by the expandable member (17). The measurement means comprise at least one capacitive sensor (14). Application to sleeving steam generator tubes of pressurised-water nuclear (electricity) power stations. <IMAGE>
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