DURATION
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UDC"4"
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Descriptor GERZEITDAUER, ZEITSPANNEN, PERIODEN
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Descriptor ENGDURATION
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Descriptor FREPERIODE + DUREE DE TEMPS
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NTFEMTOSECOND (DURATION)
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NTSHORT-TERM (DURATION)
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NTLONG-TERM
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NTLIFE AGE + AGE-GRADES
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NTLIFE SPAN OF LIVING BEINGS
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NTPICOSECONDS (DURATION)