別忘了動能跟質量的正比關係, 口徑大的子彈質量通常要大很多
Anyway,我跟你主要討論的是子彈口徑嗎?
別忘了動能跟質量的正比關係, 口徑大的子彈質量通常要大很多
Anyway,我跟你主要討論的是子彈口徑嗎?
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