This kind of resin composite manhole cover with glass fiber and resin as the basic material, curing agent, accelerator as auxiliary material.
这种树脂复合型井盖以玻璃纤维和树脂为基本材料，以固化剂、促进剂等为辅助材料制成。
Purpose to meet the government standard basic criterion GB18871-2002 for radiation protection and safety, and to optimize the design of the shielding protection of medical linear accelerator.
目的满足国家标准GB18871- 2002电离辐射防护与辐射安全基本标准的同时，优化设计医用加速器室的辐射屏蔽防护。
Purpose to meet the government standard basic criterion GB18871-2002 for radiation protection and safety, and to optimize the design of the shielding protection of medical linear accelerator.
目的满足国家标准GB18871- 2002电离辐射防护与辐射安全基本标准的同时，优化设计医用加速器室的辐射屏蔽防护。
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