爆炸点要小,火药的当量要大。现在我们谈的烟花爆竹,小当量的黑火药,倒塌的是现代钢筋水泥大桥:))
老杜,看得出你的理科基础真的非常差,和和:))
爆炸点要小,火药的当量要大。现在我们谈的烟花爆竹,小当量的黑火药,倒塌的是现代钢筋水泥大桥:))
老杜,看得出你的理科基础真的非常差,和和:))
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