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氩-氩年代测定
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氩-氩年代测定
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argon-argon dating
氩-氩年代测定
利用中子活化法使样品中的39K经过39K(n,p)39Ar反应转化为39Ar,然后用质谱计测定其40Ar/39Ar的比值,代替通常在钾-氩法中的40Ar/40K比值,计算岩石或矿物的地质年龄。
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open grid services architecture, OGSA
open growth system
open half-line
open half-plane
open half-space
open hearth furnace
open hearth steelmaking
open hemisphere
open herding
openhole cavity completion technology
open hole completion
open hole test
open-hole well logging
open immersion
open inflation
Open Information Extraction
open information source
opening
opening and cleaning machine
opening and closing ceremony of the sports meeting
opening and scutching
opening area along the border
opening-door schooling
opening of a play
opening of a wedge
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