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фемтосекунда nstresses
Makarov. femtosecond
phys. 10-15 of a second (MichaelBurov); fsec (MichaelBurov); femto second (MichaelBurov)
 Russian thesaurus
фемтосекунда n
phys. фсек (MichaelBurov)

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