00727nam a2200241 4500 0015216 20260608203240.0 260224s2007 dcu N389 A259 9 0015216 AGA Report No. 9 Measurement of gas by multipath ultrasonic meters Washington American Gas Association, AGA 2007 2011-08-04 ; 2011-08-04 97 p. NORMA American Gas Association, AGA 142 Normalización 106 Normas técnicas 126 Medición de gas 144 Medidores ultrasónicos 143 184921 184921 0 0 0 0 252740 BAAB BAAB N389 A259 9 0015216 2026-03-06 200056983 0 N389 A259 9 0015216 200056983 2026-03-06 00:10:10 2026-03-06 NORMA