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parts per billion
stresses
abbr., BrE
р.р.b.
(Milliarde)
el.chem., engl.
частей на миллиард
(1·10-9, 1·10-7)
microel.
частей на миллиард
microel., BrE
частей на миллиард
(единица измерения малых концентраций; 1 ppb-10-7 %)
part
s
per billion
food.ind., BrE
частей на миллиард частей
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