There are many three types of transistors listed on the right, sourced from Alibaba.com. One of the most common types of transistors is the nickel plating.
There is also the nickel plating transistors, in the form of nickel plating transformer, which is one of the most popular types. One of the nickel plating transistors is the nickel plating transformer, in which all copper is burned into one (aluminum and brass) transistors, one of the most common types is the nickel plating transformer.