Jisho

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(兵器)
Wikipedia definition
1. Hedgehog (weapon)This is not to be confused with the animal Hedgehog. For the area denial weapon, see Czech hedgehog. The Hedgehog (also known as an Anti-Submarine Projector) was an anti-submarine weapon developed by the Royal Navy during World War II, that was deployed on convoy escort warships such as destroyers to supplement the depth charge. The weapon worked by firing a number of small spigot mortar bombs from spiked fittings.
Read “Hedgehog (weapon)” on English Wikipedia
Read “ヘッジホッグ (兵器)” on Japanese Wikipedia
Read “Hedgehog (weapon)” on DBpedia

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