传统的通孔元件的焊接采用波峰焊或手工焊接。目前电路板上表面贴装元件和通孔元件混合在一起。
Through hole components welding using traditional manual welding or soldering. The circuit board surface mount components and through-hole components mixed together.
在传统的晶体管中，这些元件都被安装在同一电路板上。
In a conventional transistor, these components lie in about the same plane.
采用该方法处理印制电路板低铜含量的含铜废水优于采用传统的化学处理法。
It also shows that PCB wastewater containing low content of copper is treated with this kind of method better than with traditional chemical method.
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