refraction of light refractive refractive exponent refractive index refractivity refractometer refractometry refractor refractories refractory refractory alloy refractory brick refractory cement refractory clay refractory concrete refractory-faced refractory lining refractory material refractory metal refractory mortar |
refraction of light пречупване на светлина Търсената дума е намерена |