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What is a Plimsoll line? - NOAA's National Ocean Service
Waterline - Wikipedia
Ship's load line - Wikipedia
What is Plimsoll Line on Ships? - Marine Insight
Plimsoll Mark - Nauticapedia
吃水线 - 百度百科
Do you know what Plimsoll lines on ships are? - INTLREG
普里姆索尔标志 - 国际船舶网
Fast Facts: What is a Plimsoll line? - The Maritime Executive
Plimsoll line | Maritime Safety, Load Line & Regulation