straighttube boiler

例句：

1. 1. The new straighttube boiler has significantly improved energy efficiency.
   新的直通式锅炉大大提高了能源效率。
2. 2. The engineer designed the straighttube boiler to meet the needs of the industrial process.
   工程师设计了直通式锅炉以满足工业过程的需求。
3. 3. The straighttube boiler is widely used in various industries due to its compact size and efficient heat transfer.
   由于其紧凑的尺寸和高效的热传递，直通式锅炉在各种行业中得到了广泛应用。