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The utility model relates to a free-floating light beacon of navigational aid on water in the sea, a river, or a harbor.
本实用新型是一种海、河港口用水上助航活节式灯桩。
youdao
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The utility model relates to a free-floating light beacon of navigational aid on water in the sea, a river, or a harbor.
本实用新型是一种海、河港口用水上助航活节式灯桩。
youdao