proper double refraction sound of pronunciation

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proper double refraction in Hindi：उचित द्वि अपवर्तन; उचित द्विअपवर्तन

Neighbors

"proper course" sound, "proper court" sound, "proper custody" sound,

"proper density" sound

"proper difference" sound

"proper energy" sound

"proper entropy" sound

"proper establishment" sound

"proper expenses" sound