Example sentences of "[noun] [verb] been [prep] operation since " in BNC.
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1 | The police national computer has been in operation since 1974 . |
2 | The Mid Glamorgan Education Business Partnership has been in operation since 1989 . |
3 | The idea of garden festivals was imported from Europe , particularly West Germany , where the concept had been in operation since 1945 . |
4 | This scheme had been in operation since 1977 . |
5 | Although the CNAA system had been in operation since 1964 , ‘ it is only recently that it has made almost total inroads as far as the central , advanced colleges of technology in Scotland are concerned ’ . |