Condenser aperture-A little laser-bored hole in a flat strip of molybdenum put near the condenser lens that assists to Restrict spherical aberration.Bên c?nh nh?ng ?u ?i?m nh? trên thì Decal nh?a trong có m?t h?n ch? khi?n cho nhi?u ng??i ph?i cân nh?c tr??c khi l?a ch?n nh?:The second anode (Anode two) accelerates the electrons to the require