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ppbw abbr.
abbr. ppb by weight (MichaelBurov)
O&G parts per billion by weight
tech. ppb mass (неточно вместо ppbm; чаще: ppb by mass MichaelBurov); ppb by mass (MichaelBurov)
PPBW abbr.
abbr., mil., avia. pulse particle beam weapon
tech. pulse particle beam weapon

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