thoriated tungsten emitter

例句：

1. 1. The new laser printer uses a thoriated tungsten emitter to produce high-quality documents.
   这款新型激光打印机使用钍掺杂钨发射体来产生高质量的文档。
2. 2. The scientist developed a new emitter that uses thoriated tungsten for better performance.
   这位科学家开发了一种新型的发射体，使用钍掺杂钨以提高性能。
3. 3. The emitter is crucial for the efficient operation of the device, and its design has been optimized for maximum efficiency.
   这种发射体对于设备的高效运行至关重要，其设计已被优化以实现最大效率。