| 21. | The development of a passive hydrogen maser for QZSS was abandoned in 2006.
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| 22. | The radiation amplified by hydroxyl masers is the radio continuum of its host.
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| 23. | The " antigravity " Phonon Maser is hidden in the secret undeground lab.
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| 24. | Maser began her television career as a freelance writer.
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| 25. | Together, they later invented the laser and its cousin, the maser.
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| 26. | H 2 O and OH can both be pumped to produce maser emission.
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| 27. | Some of them, among which is W Aquilae show SiO maser emission.
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| 28. | Some of them, among which is S Cassiopeiae show SiO maser emission.
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| 29. | IK Tauri has strong maser emission from its extended atmosphere and circumstellar material.
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| 30. | A maser is the radio counterpart of a laser, which amplifies visible light.
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