English translation for "optical sound film"

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Similar Words：

"optical soliton" English translation, "optical soliton communication" English translation, "optical sorting" English translation, "optical sound" English translation, "optical sound evaluation test film" English translation, "optical sound film projector" English translation, "optical sound head" English translation, "optical sound lamp" English translation, "optical sound propagation" English translation, "optical sound recorder" English translation