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Represents a gyro , gyroscope , or gyrocompass .

表示回转仪、陀螺仪或回转罗盘。

Signal from gyrocompass is used to control simple aircraft autopilots .

陀螺信号用于控制飞行导航仪。

From the standpoint of the gyrocompass the earth appears to be rotating about an axis making an angle with the true polar axis .

从陀螺罗盘的位置观察地球，好象地球是绕着偏离其极轴ε角的一个轴在移动。