电子发生装置，成像装置，及制造和调节这些装置的方法。

Electron generating apparatus, image forming apparatus, and method of manufacturing and adjusting the same.

youdao

电子发生装置，成像装置，及制造和调节这些装置的方法。

Electron generating apparatus, image forming apparatus, and method of manufacturing and adjusting the same.

youdao