“HDE”是“Humanitarian Use Exemption”的缩写，意思是“

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“HEPA”是“High-Efficiency Particulate Air filter”的

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“HF”是“Headquarters, FDA Office of the

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“HFD”是“Headquarters, FDA Drug; mail code for

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“HFM”是“Headquarters, FDA Management; mail code

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“HFS”是“Headquarters, FDA Safety; mail code for

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“HFT”是“Headquarters, FDA Toxicology; mail code

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“HFV”是“Headquarters, FDA Veterinary; mail code

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“HFZ”是“Headquarters, FDA code Z; mail code for

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“HHS”是“Department of Health and Human Services”的

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