light diffusion pump

例句：

1. 1.The light diffusion pump is used in the fabrication of semiconductor devices.
   光扩散泵用于半导体器件的制造。
2. 2. This type of pump is particularly useful for high-pressure applications where a large amount of gas needs to be diffused.
   这种泵特别适合高压应用，需要大量气体扩散时使用。
3. 3. In the process of diffusion pumping, the gas molecules are forced to move through a thin film of material, which helps toremove impurities from the substrate.
   在扩散泵过程中，气体分子被强制通过一层薄材料，这有助于从衬底上去除杂质。