- certificate of compass adjustment
- 罗经: compass
- 校正: check; correction; adjust; r ...
- 证书: certificate; credentials
- 磁罗经校正: compassadjustment; magnetic compass adjustment
- 罗经校正: compass adjustment; compass calibration; compass compensating; compass compensation; compassadjustment; compasscalibration; compasscompensating; compasscompensation; compensation of compass; compensationofcompass
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