obs基本解释
abbr.观察(=Observation)
abbr.瞭望台(=Observatory)
abbr.已废的(=Obsolete)
abbr.无线电定向标选择器(=Omnibearing Selector)
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基本词汇
abbr.观察(=Observation)abbr.瞭望台(=Observatory)abbr.已废的(=Obsolete)abbr.无线电定向标选择器(=Omnibearing Selector)
abbr.观察(=Observation)
abbr.瞭望台(=Observatory)
abbr.已废的(=Obsolete)
abbr.无线电定向标选择器(=Omnibearing Selector)
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