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AGA B109.1   2019   Diaphragm Type Gas Displacement Meters (under 500 Cubic Feet Per Hour Capacity) - X61902 150 $
AGA B109.1   2008   Diaphragm Type Gas Displacement Meters (under 500 Cubic Feet Per Hour Capacity) - Fourth Edition; XQ0008 50 $
AGA B109.1   2000   Diaphragm Type Gas Displacement Meters (under 500 Cubic Feet Per Hour Capacity) - Fourth Edition; XQ0008 30 $
AGA B109.1   1992   Diaphragm Type Gas Displacement Meters (under 500 Cubic Feet Per Hour Capacity) - Fourth Edition; XQ0008 30 $
AGA B109.1   1986   Diaphragm Type Gas Displacement Meters (under 500 Cubic Feet Per Hour Capacity) - Fourth Edition; XQ0008 30 $
AGA B109.1   1973   Diaphragm Type Gas Displacement Meters (under 500 Cubic Feet Per Hour Capacity) - Fourth Edition; XQ0008 30 $