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Ar is The premise of a typical technique for courting rocks. The traditional K-Ar dating system depends upon the idea that the rocks contained no argon at the time of formation and that each one the following radiogenic argon (fortyMáy bay phun thuốc DJI Máy bay phun thuốc XAG Máy bay phun thuốc TopXGun Linh kiện - Phụ kiện Kiến th