子弹壳是一种常见的金属制品,通常由黄铜、铝合金或钢质合金材料制成,用于容纳火药和弹头。在射击活动或军事训练中,大量的子弹壳会被使用并留下。而这些废弃的子弹壳如果被正确回收利用,可以为环境保护和资源节约做出贡献。
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