marks for measuring velocity
... 导标 leading beacon 测速标 marks for measuring velocity 无线电指向标 radio beacon ...
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... measured distance mark 已测距离标 measured distance marks 测速标 measured distance 船速校验距离 ...
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... speed margin 速度储备量 speed marks 测速标 speed matching equipment 转速匹配系统 ...
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测速标 marks for measuring velocity; marksformeasuringvelocity; measured distance mar ..
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