超声波能量的机械性质，可在很低的温度下工作。
Ultrasonic energy is mechanical in nature and works at much lower temperatures.
机器咯噔咯噔地响着，工作性质是很机械的。
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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