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If a glass layer's shape is off so much as a fraction of a micron, the scope's precision takes a mighty blow.
只要有一层玻璃的形状差了仅仅千万分之一米,望远镜的精确度就会大打折扣。
youdao
-
If a glass layer's shape is off so much as a fraction of a micron, the scope's precision takes a mighty blow.
只要有一层玻璃的形状差了仅仅千万分之一米,望远镜的精确度就会大打折扣。
youdao