distant reading compass 遥示罗经
distant-reading compass indicator 远读罗盘指示器
distant reading compass indicator 远读罗盘指示器
distant-reading gyro-magnetic compass 远读陀螺罗盘
distant-reading flux-gate compass 远读咸应罗盘
distant reading flux gate compass 远读感应罗盘
distant reading gyro magnetic compass 远读陀螺磁罗盘
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