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电引火头在金属桥丝周围涂有点火药,由通电的桥丝使其灼热、燃烧的滴状点火元件
expl. electric fuse head; fuse head
电引火头在金属桥丝周围涂有点火药,由桥丝灼热引燃的滴状引火元件,有刚性和弹性两种结构
expl. fuse head