In nhãn s?n ph?m có r?t nhi?u ph??ng pháp ???c s? d?ng th?c t? trong ?ó in offset và in k? thu?t s? là ?ng d?ng ph? bi?n h?n. Saturation Stage-The point at which excellent electron emission through the gun is reached with no shortening the filament lifetime appreciably.A vacuum technique is utilized to take care of the expected vacuum conc