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Mar 09 2021 Read 419 Times ChroZen ASTM D1945 Player with column switching valve system effectively analyses natural gases by controlling the valve switching time with accuracy and precision and verifies its reliability by effectively determining each component of natural gases according to ASTM D1945. Natural gases consist of methane (major component), other hydrocarbons and permanent gases like hydrogen, oxygen, nitrogen as well as carbon dioxide. They are used as major energy sources in nume...