The ratio of valid stand-off distance to diameter of nozzle (Sv/d) is 8.33, 5 and 3.3 as the variation of ambient pressure as 3.3MPa, 5.3MPa and 8.6MPa.是什么意思_The ratio of valid stand-off distance to diameter of nozzle (Sv/d) is 8.33, 5 and 3.3 as the variation of ambient pressure as 3.3MPa, 5.3MPa and 8.6MPa.在线翻译_英语_读音_用法_例句