trench periscope
now historical
noun
A kind of periscope used in trench warfare to observe enemy lines from inside one's own trenches.
Origin
Early 20th century; earliest use found in The Daily Mail.
| 单词 | trench periscope |
| 释义 | trench periscopenow historical noun A kind of periscope used in trench warfare to observe enemy lines from inside one's own trenches. Origin |
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