Ths paper relates the reasons that cause static electricity as well as the electron circuit plate. It also introduces anti-electrostatic packing of electron circuit plate and tests technology.
本文叙述了静电产生的原因及静电对电子线路板的危害，还介绍了电子线路板的防静电包装方案及检测技术。
2
The quenching sensitivity of 7050 aluminium alloy hot-rolled plate was studied by using end quenching test and optical microscopy (OM) and transmission electron microscopy (TEM).
用末端淬火、光学金相显微镜和透射电镜技术研究7050铝合金热轧板的淬火敏感性。
3
With electron microscope the fracture surface and metallographic structure analysis is done for typical sample of Q235, Q345 plate of low elongation, its reason found out, some Suggestions proposed.