气枪为什么要用空气作为能量,直接用弹簧撞击弹丸不行吗,弹簧推动活塞再�射弹丸,中间肯定有能量损失吧? 知乎 Template




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tomski气枪为什么要用空气作为能量,直接用弹簧撞击弹丸不行吗,弹簧推动活塞再�射弹丸,中间肯定有能量损失吧? 知乎 coloring