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Jyutping saam1 baat3 daai6 goi3
Pinyin sān bā dà gài

Definitions (Wiktionary)
  1. noun, colloquial, historical
    Type 38 rifle

三八大蓋 [---盖]

Jyutping
Pinyin sān bā dà gài

Definitions (CC-CEDICT)
  1. (coll.) Arisaka Type 38 rifle (Japanese army rifle used 1905-1945)