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巨型 clockdrive

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發表於 2011-5-6 17:16:46 | 顯示全部樓層 |閱讀模式
WWII 之前的巨型 gravity clock drive



圖片說明 (翻譯)  "The gravity clock drive of Gustav Heyde/Dresden (Gustav Heyde was a well known company in Germany, established before the second worldwar, which was producing telescopes and mounts) was probably used by Max Wolf (Heidelberg) and is very precise."
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