furnace crown

例句：

1. 1. The furnace crown is a critical component of the steelmaking process.
   炉顶是钢铁生产过程的关键部件。
2. 2. The engineer inspected the furnace crown to ensure it was in good condition.
   工程师检查了炉顶以确保它处于良好状态。
3. 3. The furnace crown is designed to withstand high temperatures and pressures during the steelmaking process.
   炉顶设计用于在钢铁生产过程中承受高温和压力。