| 41. | It has a design life of one year.
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| 42. | It has a design life of 15 years.
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| 43. | It had a design life of 7.5 years;
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| 44. | It had a design life of 7.5 years,
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| 45. | It has a design life of fifteen years.
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| 46. | They had a design life of six months, but were actually shut down after five years.
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| 47. | A lot of these aging facilities have outlived their design life and have to be replaced.
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| 48. | He seems personally offended that any person could believe that anything other than nature could design life.
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| 49. | It is way beyond its design life.
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| 50. | They can become severe enough to force repair or replacement before the end of the structure's design life.
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