percussion cap

名词 percussion cap:

1. a detonator that explodes when struck

1. A device, such as a fuse or percussion cap, used to set off an explosive charge.
   引爆器用来引爆炸药的装置，例如引线或火帽等
2. A small firework consisting of some gravel wrapped in tissue paper with a percussion cap that explodes when thrown against a hard surface.
   掼炮一种由草纸包住一些砾石制成的小型鞭炮，其打火帽在与坚硬表面撞击时发生爆炸