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示位标
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示位标
Encyclopedia
工学
水运交通指示
释
position indicating mark
示位标
设在湖泊、水库、水网地区或其他宽阔水域与重要航道附近,标示岛屿、浅滩、礁石及通航河口等特定位置,供船舶定位或确定航向的水上助航标志,又称灯塔。在内河航道可以为各种形状的塔形体。塔身外涂有显明的颜色,便于船舶识别。
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purple blue paper
purple boundary
purple bud
purple clover
purple color crabapple pattern field yarn
purple coneflower
purple dragon sesame yarn
purple flower holly leaf
purpleflower violet
Purple Forbidden Enclosure
purple granadilla
Purple Hisbicus
purple Japanese barterry
purple loosestrife
purple membrane
purple membrane-dependent phototrophy
Purple Mountain
Purple Mountain Observatory
purple orchid tree
Purple Palace
purple pearl
purple seal
purple-spotted bigeye
purple stonecrop
purple striae
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