Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym PNPB is...

PNPB is

Positive-Negative Pressure Breathing

More Meanings For PNPB:

PolyNucleotide Phosphorylase B
P-NitroPhenyl Butryate
Positive-Negative Pressure Breathing

PNPB is also in:

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