单词rim-fire
n.: 边缘发火网络: 缘火式;打破;边火
边缘发火
The total length of the firearm does not exceed 5. 5 cm. It shoots 2. 34 mm calibre bullets, the smallest rim fire ammunition in the world.
手枪的总长度不超过5厘米,使用世界上最小的缘火式2.34毫米口径的子弹。