Condenser aperture-A small laser-bored hole within a flat strip of molybdenum placed close to the condenser lens that assists to Restrict spherical aberration. C?u t?o c?a chúng bao g?m 2 ph?n riêng bi?t ph?n decal và ph?n d?. M?i ph?n l?i ???c chia ra làm two l?p: Ph?n