refractory powder

例句：

1. 1. The engineer used a special refractory powder to coat the surface of the furnace.
   工程师使用一种特殊的耐火粉来涂覆炉的表面。
2. 2.The refractory powder was applied evenly to prevent any hot spots from forming.
   耐火粉被均匀地应用，以防止形成任何热点。
3. 3. The refractory powder was used in the construction of the new reactor to ensure its long-term stability.
   耐火粉用于新反应器的建设中，以确保其长期稳定性。