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D88EC7E8-E3FB-4F6D-A2CE-00F7A1C48C48@1xCreated with sketchtool.Watch from niconico

岡山天体物理観測所 188cm反射望遠鏡蒸着作業Watch from niconico

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岡山天体物理観測所 188cm反射望遠鏡蒸着作業

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