给出了非合金接触情况下，PNP型HBT基极比接触电阻和接触阻抗的解析计算方法和结果。
In this paper, we proposed a theoretical method and results for calculating special contact resistance and contact impedance of base contact of a PNP type HBT.
另外，对现有的银铜类合金接触线应改善它的平直度，以降低离线率，使质量达到国外同类先进产品的水平。
It must improve the regularity of the present cupreous alloys in order to reduce the rate of contact loss and make its quality reaches up to the level of excellent overseas congeneric product.
该项研究表明，持续接触1元面值（合88美分）和2元面值的欧元硬币5分钟，这两种硬币中所含的镍合金就可能引发皮肤病症状，包括皮炎和皮肤搔痒。
Just five minutes of contact with one-euro (88 U.S. cents) and two-euro coins containing nickel alloy could trigger symptoms, including skin inflammation or itching, the study said.
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