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鸣笛标
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鸣笛标
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水运交通指示
释
whistle board
鸣笛标
设在通航控制河段或上、下行船舶不能相互通视的急转弯的上下游两端河岸上,指示船舶鸣笛的水上助航标志。
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periodic spectrum
periodic speed fluctuation
periodic state
periodic stream
periodic structure
periodic subgroup
periodic surface
periodic surface calculation model
periodic system
periodic systematic sampling
periodic system of elements
periodic table of elements
periodic term
periodic training principle
periodic trajectory
periodic transformation
periodic treatment
periodic trend
periodic variable
periodic variation
periodic variation of corona
periodic vector
periodic vibration
periodic water flooding
periodic water injection
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