wheel lock
柯林斯词典
1. N a gunlock formerly in use in which the firing mechanism was activated by sparks produced by friction between a small steel wheel and a flint (旧时枪用)轮锁打火装置
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1. N a gunlock formerly in use in which the firing mechanism was activated by sparks produced by friction between a small steel wheel and a flint (旧时枪用)轮锁打火装置