The beam then arcs circumferential ly back to a negatively charged high energy flux aperture.

然后光束沿着四周成弧状折回一个充满负电的主能量通行孔径。

youdao

The beam then arcs circumferential ly back to a negatively charged high energy flux aperture.

然后光束沿着四周成弧状折回一个充满负电的主能量通行孔径。

youdao