Longitudinal and transverse separtions between the tanks,which are used to prevent liquids from leaking from one double bottom tank into the other ,are called().
要了解某张海图的现行版日期时可查阅()。 Ⅰ.航海图书总目录;Ⅱ.英版航海通告累积表;Ⅲ.英版航海通告年度摘要;Ⅳ.季末版航海通告。
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