關於「NK class」標籤，搜尋引擎有相關的訊息討論：

Topics at IACS | ClassNK - 繁體中文... of Classification Societies, more commonly known as IACS, was established in 1968 by seven leading classification societies (ABS, BV, DNV, GL, LR, NK, ...繁體中文 - ClassNKClassNK works to ensure maritime safety and protect the marine environment.