direction gyro indicator方向陀螺指示仪

direction n indicator方向标

change direction command indicator变化方向命令指示器;[计] 换向命令指示符;翻译

direction indicator indicator方向标转向标

change-direction command indicator换向命令指示符

Direction indicator lamp转向指示灯;转向信号灯

Direction indicator arm转向指示器臂

hand direction indicator手动示向器

electrically driven direction indicator电动陀螺半罗盘