研究了废弃印刷线路板的主要成分在机械处理过程中的物理性质的变化。
The variety of physical properties of PCBs during mechanical treatment has been studied.
在材料选择时必须考虑材料的物理性质和机械性能。
The physical property and mechanical performance must be considered when selecting the valve material.
在材料选择时必须考虑材料的物理性质和机械性能。
The physical property and mechanical performance must be considered when selecting the valve material.
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