The contactdamage and fracture property of silicon single crystal are investigated at room temperature by indentation, as well as the influence of the intended and unintended impurities.
室温下使用维氏硬度计研究了硅单晶表面的接触损伤及硅单晶中杂质对表面损伤的影响。
2
However, conventional Turner bars or sweat rolls require physical contact which can damage the web surface and cause web creasing.
然而，常规转向器的条杆或蒸汽滚筒需要物理接触，这样会导致卷筒纸表面损坏和卷筒纸有折痕。
3
Rodding with metal rods or other metal tools that could contact and damage the coating shall not be permitted.