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 ’ .
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