A、magnetism from the earth's magnetic field
B、misalignment of the compass
C、magnetism within the vessel
D、a dirty compass housing
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A、magnetism from the earth's magnetic field
B、misalignment of the compass
C、magnetism within the vessel
D、a dirty compass housing
时间：2022-01-05 21:21 关键词： 航海仪器使用说明书
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