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37 Nautical Equipment

370581Black Ball
370582Black cylinder Shape
370583Black Conical Shape
370584Double Conical Shape
370585Diamond Shape

Marine sextant 航海六分仪

The marine sextant is a kind of reflectional optical angular measuring instrument used for measuring two horizontal included angles fo three known ground-based position with 3 pole distin......

Air Horn 汽笛

Lifeboat Compasses 救生艇磁罗经
Marine Use Paper