❪✺_ₜₛ❫ Electromagnetic Typesets ○ Relationships

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• ❪✺_ₛₛ❫ Electromagnetic Subsets ○
• ❪✺_ₜₛ❫ Physical Typesets ○

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• ❪✺_ₜₛ❫ Spectroscopic Typesets ○

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