我国目前拥有大中型修船干船坞四十多座,占世界大中型修船干船坞总数的十六分之一,就其数量而言并不算少,但以船坞吨级来看,25000吨级及其以上吨级的船坞仅占全国大中型船坞总数的1/8,且最大吨级的船坞仅为五万吨级;坞长超过200米以上的船坞数量仅占世界修船干船坞该档数量的五十四分之一,可见大吨级船坞的数量不仅与 At present, China has more than 40 large and medium ship repair docks, accounting for one-sixth of the total number of large and medium ship repair docks in terms of quantity. However, in terms of dock tonnages, 25,000 tonne Only one-eighth of the total number of large and medium-sized docks and only the largest tonnage of docks is only 50,000 tons; docks over 200 meters in length only the number of dry-dock Fifty-fourth of the number of stalls, we can see the number of large tonnage dock not only