单词	便利之狀
释义	同FITLY
随便看	directional frictional effect directional function directional gain directional ground relay directional gyro directional gyro compass directional gyrocompass directional gyro (dg) directional gyroscope directional gyro （dir.gyrocompass, dir.gyroscope) directional homing directional hydraulic conductivity directional hydrophone directional index directional instability directional island directionalities directionality directionality of variable directionality problem directional launch directional light directional lighting directional line directional loudspeaker