This article focuses on the process of shaping the mixed rifle with a large spiral angle in the cannon, and proposes a cone-like cathode structure with asymmetric cuneiform working tooth.

分析了火炮身管大缠角混合膛线的成型过程，提出圆锥体单边切进楔形工作齿的阴极结构，经试验确定了阴极体锥度、长度与楔形工作齿角度的匹配关系。

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Marine archaeologists working on a wreck off the coast of Sicily have discovered five large cannon from a British ship, believed to have sunk in a major battle with Spanish galleons.

BBC: British cannon from Battle of Cape Passaro found off Sicily