单语范例（未经PONS编辑处理）
英语
- The soldering iron tip must be clean and pre-tinned with solder to ensure rapid heat transfer.en.wikipedia.org
- Excess solder and unconsumed flux and residue is sometimes wiped from the soldering iron tip between joints.en.wikipedia.org
- Soldering iron tips are made of copper plated with iron.en.wikipedia.org
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英语