How many tests were needed for the engine that powered the first stage of Ariane 5? -Technology

How many tests were needed for the engine that powered the first stage of Ariane 5? -Technology
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Six subsequent static firing tests, which ran through July 1995, were conducted with flight-type casings. Ariane 5's ground testing was completed after a series of six hot firing tests of the launcher's core cryogenic stage, which ran from June 1995 to January 1996 in French Guiana.
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