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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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nucleation theory
nucleic acid
nucleic acid amplification technology
nucleic acid aptamer
nucleic acid biosensor
nucleic acid blotting analysis
nucleic acid chain resection
nucleic acid chemical biology
nucleic acid chemistry
nucleic acid damage
nucleic acid database
nucleic acid detection of genetically modified ingredients
nucleic acid drugs
nucleic acid electrophoresis
nucleic acid hairpin structure
nucleic acid hybridization
nucleic acid isolation machine
nucleic acid liquid-phase synthesis
nucleic acid metabolism
nucleic acid methylation
nucleic acid metrology
nucleic acid modification
nucleic acid probe
nucleic acid repair
nucleic acid self-assembly
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更新时间:2026/9/6 16:56:31