单词	sandell index
释义	sandell index 桑德尔指数
随便看	critical sound velocity critical source area critical source areas critical space critical spacing Critical span critical speaking teaching mode critical species critical species of marine pollution critical specifications elements critical specific surface critical specific volume critical spectatorship critical speed critical-speed critical, speed critical speed in resistance braking critical speed of mill critical speed of revolution critical speed of revolutions critical speed of rotation critical speed of rotor critical speed of second order critical speed of shaft critical speed of shafting