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l170r01 SF6 analysis separating pricing

l170r01 SF6 analysis separating pricing

l170r01 SF6 analysis separating pricing,CFCs are potentially useful tracers of groundwater flow because they are non-reactive and their input history is well known. CFC-12 (CCl 2 F 2) and CFC-11 (CCl 3 F) were introduced into the atmosphere in the late 1940's while CFC-113 (CCl 2 FCClF 2) was first released to the atmosphere in the 1960's.The atmospheric concentrations of these CFCs increased until 1993 for CFC-113, 1994 for CFC

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