- libration period
- 天平动周期
English-Chinese dictionary of mechanical engineering (英汉机械工程大词典). 2013.
libration period
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Lagrangian point — The Lagrangian points (IPA en|ləˈgreɪndʒiən, IPA fr|lagʁɑ̃ʒjɑ̃; also Lagrange point, L point, or libration point), are the five positions in an orbital configuration where a small object affected only by gravity can theoretically be stationary… … Wikipedia
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