burning of contact material

例句：

1. 1. The engineer was required to inspect the burning of contact material during the manufacturing process.
   工程师被要求在制造过程中检查接触材料的燃烧情况。
2. 2. The new technology involves the burning of contact material for energy production.
   这项新技术涉及利用接触材料进行能源生产。
3. 3. The firefighters were able to extinguish the burning of contact material in the factory.
   消防员成功扑灭了工厂内接触材料的燃烧。