soldering iron

noun
🔊/ˈsəʊldərɪŋ aɪən/, 🔊/ˈsɒldərɪŋ aɪən/
🔊/ˈsɑːdərɪŋ aɪərn/
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  1. a tool that is heated and used for joining metals and wires by soldering them烙铁