青云翻译

Glow discharge in a few tenths to tens of Pa under low vacuum.

Glow discharge in lingdianji to dozens of PA under low vacuum.

The glow discharge carries on in the zero several to under several dozens handkerchief rough vacuums.

glow discharge to zero in a few 10 under low vacuum.

Glow discharge in lingdianji to dozens of PA under low vacuum.