Submarines : china embarked on a large submarine building program in the 1960s , which tapered - off in the late 1980s , which included many diesel - electric patrol submarines and some nuclear powered submarines 潜艇：中国自六十年代起着手开始了一项包括许多柴电动力潜艇和一些核潜艇在内的庞大潜艇建造计划，该计划在八十年代末逐渐停止下来。
