中國的平底船穩定性差,不適合遠洋航行。歐洲的尖底船穩定性好多了。
所有跟帖:
• 忽必烈第一次征討日本 -老生常談12- ♂ (146 bytes) () 08/30/2020 postreply 08:49:04
• 忽必烈第一次征討日本 -老生常談12- ♂ (146 bytes) () 08/30/2020 postreply 08:49:04
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