In this paper it is discussed how the material should be reasonably selected in machine design according to its strength, stiffness and density, so that the weight of machine parts can be lighten.
叙述机械设计过程中，如何根据材料强度、刚度与密度之间的相对关系，合理选择材料，以减轻机械构件的重量。
This paper describes the selection of material for EHV Shielding clothing, it's criterion of weaving thread of density and the texture design.
本文阐述了超高压屏蔽服材料选用，织物密度确定原则和服装结构设计。
The results of sampling taken from in-situ of the model test show that constructing model by this design method is available; and the density and property of the model material are uniform and stable.
原位取样测试结果表明，按照这种方法设计制作的模型，最终能达到模型中同一类型材料所要求的密度整体相对一致的效果，从而提高了物理模型中材料力学性质的稳定性。
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