[问题] APO厉害,还是施密特厉害? |
施米特改正镜
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?????
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逆推法用得太好了
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回复: 无修止的争论现在开始
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太阳观测
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回复: 太阳观测
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热平衡
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apo的光学系统是怎样的?
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马-卡并不代表小视角
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