| 21. | Although modern filters are meant to be retrievable, complications may prevent some from being removed.
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| 22. | Often in earlier decades these smudges were ignored because very little of their detail was retrievable.
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| 23. | Among Discovery's major activities will be the deployment Saturday of a retrievable satellite called Spartan.
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| 24. | Sputnik 2 was not designed to be retrievable, and Laika had always been intended to die.
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| 25. | The information is publicly available and " de facto " retrievable forever via media archives.
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| 26. | If an appropriate pre-learned schema is retrievable, then a survival response will be initiated.
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| 27. | A short, easily retrievable, wooden ladder could then be used to reach the elevated entrance.
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| 28. | The primary mission of this flight was the retrieval of the European Retrievable Carrier satellite ( EURECA ).
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| 29. | If the packer is retrievable it can be released easily enough and pulled out with the completion string.
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| 30. | China has successfully launched 17 retrievable satellites since 1975, recovering all but one, the news agency said.
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