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Condenser aperture-A small laser-bored gap in a very flat strip of molybdenum put near the condenser lens that assists to limit spherical aberration.
+ Giá r?t r? cho nh?ng lo?i gi?y decal v? có ch?t l??ng trung bình kho?ng twenty-30K/1m
The next anode (Anode 2) accelerate