初步设计阶段，设计者着重考虑产品应该具有的功能。
In the preliminary design stage, the designer emphatically considered the product should have function.
在初步设计阶段，根据工艺性、工作环境、强度分析选择具体材料牌号；
Materials are examined by strength and technology property analysis in detail design step.
在初步设计阶段，根据工艺性、工作环境、强度分析选择具体材料牌号；
Materials are examined by strength and technology property analysis in detail design step.
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