HI 21cm line

電磁気
Synonyms (2)：

hydrogen 21cm line (中性水素21cm線)
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hydrogen line (HI21cm線)
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Related terms (3)：

atomic spectrum (原子スペクトル)
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radio astronomy (電波天文学)
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- Detailed information
hydrogen neutral atom (水素中性原子)
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- Detailed information

Broader terms (1)：

Thsaurus map：

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