Glass: Crown glass , barium , flint glass , titanium oxide glass, lanthanum crown glass
Manufacturing-of-Glass-lensesLecturer (Nethradhama School of Optometry)
Moptom
Glass: Crown glass , barium , flint glass , titanium oxide glass, lanthanum crown glass
Manufacturing-of-Glass-lensesLecturer (Nethradhama School of Optometry)
Moptom