... 电信号，电号志 electric signal 电烙铁 electric solder iron 电源 electric source ...
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The head of electric iron is heated to the melting point of welding solder, which is immersed with an even layer of solder and clean the head with clean, wet sponge or wet cloth.
电烙铁准备 （The preparation of electric iron） 将烙铁头加热至可以熔化焊料的温度， 在头部浸一层薄而均匀的焊料， 并用清洁潮湿的海绵或湿布擦拭烙铁头表面。
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