海量資源,盡在掌握
 first class (Lloyd’s Register)英國勞氏船級(jí)社的船級(jí)符號(hào),表示船體和舾裝質(zhì)量優(yōu)等;highest hull classification for American Bu-reau of Shipping美國船級(jí)社的船體符號(hào),表示最硬的船體結(jié)構(gòu)......(本文共 125 字) [閱讀本文] >>