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Military
containing
观测
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in specified order only
Chinese
English
炮兵
右
观测
手
right observer
炮兵
左
观测
手
left observer
"轨道地球物理
观测
站"
"OGO"
(观测卫星(美))
"轨道天文
观测
站"
"OAO"
(研究卫星(美))
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