1. Orifice metering of natural gas and other related hydrocarbon fluids 2nd Edn.ANSI/API 2530 American Gas Association Arlington, USA
2. The decay of swirling gas flow in long pipes;McManus,1985
3. The swirl damping properties meter installation;Mottram,1986
4. Effects of a swirler on orifice meter flow measurement;Shen,1989
5. The use of orifice plates and venturi nozzles in swirling or asymmetric flow;Blake,1976