optical development sec. sound of pronunciation

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optical development sec. in Hindi：प्रकाशिक विकास अनुभाग

Neighbors

"optical corrections" sound, "optical cross-section" sound, "optical crown glass" sound,

"optical density" sound

"optical depth" sound

"optical diagnosis" sound

"optical dielectric constant" sound

"optical differentiation" sound

"optical diffraction velocimeter" sound