A tubular apparatus containing a system of prisms or mirrors so as to give a viewpoint displaced from the observer's eye by the length of the…
| 单词 | θ165206 |
| 释义 | society > armed hostility > hostilities at sea > naval weapons and equipment > [noun] > periscope (3) periscope1899 A tubular apparatus containing a system of prisms or mirrors so as to give a viewpoint displaced from the observer's eye by the length of the… Subcategories:— depth of (2) |
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