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• 真实姓名beidoou
• 性别女
• 生日1995 年 3 月 15 日
• 个人主页https://www.beidoou.com/materials/common-types-of-concrete.html
• 兴趣爱好It refers to concrete with density greater than 2600 Kg/m³. It is usually made of high density aggregate (such as barytes , iron ore, steel chips, etc.) or heavy cement (such as barium cement, strontium cement, etc.). Because it is mainly used as radiation shielding structural material in atomic power plants, also known as radiation-proof concrete.

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