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for subject
Technology
containing
parts per billion
|
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English
Russian
parts per billion
by mass
ppb по массе
(
MichaelBurov
)
parts per billion
volume
частей на миллиард по объёму
(
MichaelBurov
)
parts per billion
volume
ppbv по объёму
(
MichaelBurov
)
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