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to phrases
parts per million by volume
abbr.
ppbv
(
MichaelBurov
)
abbr., O&G, casp.
ppmv
(
raf
)
tech.
ppmv
(
MichaelBurov
)
parts:
3 phrases
in 3 subjects
Information technology
1
Military
1
Telecommunications
1
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