The circuit board is placed in the welding stage, the pins through hole components welding, choose appropriate spray tin, soldering start.

将电路板放置在焊台上，针对需要焊接的通孔元件管腿，选择合适的喷锡口，启动波峰焊接。

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Through hole components welding using traditional manual welding or soldering. The circuit board surface mount components and through-hole components mixed together.

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。

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Removed from the circuit board through-hole components via multi pin component and the large heat capacity is quite troublesome, such as transformer, connector.

从电路板上拆除多引脚的通孔元件和大热容量的通孔元件比较麻烦，比如变压器、接插件。

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The most complex part of the build was etching the printed circuit boards that spotted when a body part or the tongs touched the live edges of the hole it was in, said Mr Lang.

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