00732nam a2200241 4500 0013469 20260608203133.0 260224s1998 xxu N389 A259 9 0013469 AGA Report No. 9 Measurement of gas by multipath ultrasonic meters Arlington American Gas Association, AGA 1998 11/05/05 ; 19/03/2003 [pag. varía] NORMA American Gas Association, AGA 142 Normalización 106 Normas técnicas 126 Medición de gas 144 Medidores ultrasónicos 143 136829 136829 0 0 0 0 207648 BAAB BAAB N389 A259 9 0013469 2026-03-04 200015090 0 N389 A259 9 0013469 200015090 2026-03-04 15:04:29 2026-03-04 NORMA