中国海员使用的轴舵和其他技术部件直到15世纪中叶才为欧洲的远洋船所采用。
Chinese seaman had axial rudders and other technological features not adopted by the sea going European ships until the middle of the 15th century.
中国海员使用的轴舵和其他技术部件直到15世纪中叶才为欧洲的远洋船所采用。
Chinese seaman had axial rudders and other technological features not adopted by the sea going European ships until the middle of the 15th century.
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