六彩开奖结果记录 www.lnznl.com 近些年来，中国海军取得了相当长足的进步，军舰的下水的速度已经无愧为“下饺子“。但是有一个问题不容忽视，那就是核潜艇的数量和质量上，还跟美、俄之间存在差异。尤其俄罗斯现役有27艘核潜艇，而美国海军仍然还有70艘核潜艇，可中国的核潜艇数量还停留在十位数。
China is building a factory so big that when it's done, it will be able to accommodate the construction of four submarines at once-out of sight from military enthusiasts and spy satellites alike.
Despite having control over its Internet and press, the Chinese government has had enduring problems with military enthusiasts sneaking pictures of new ships and aircraft under development or construction. While some of this is useful to telegraph China's broader intentions and give a hint of its capabilities, the rest of it is considered a nuisance. Building an indoor submarine factory keeps sensitive subjects such as the hull shape of a submarine or even the propeller design a secret.
This does not necessarily mean China now has a submarine-building edge over the U.S. The U.S. Navy commissions about two submarines a year, each of which takes about three years to build. That puts U.S. submarine construction at about six at a time, ahead of this factory's four. Of course, China builds submarines at other locations too, and may even build them a little faster.
Speed isn't everything. Even if China ends up capable of building more submarines per year than the United States can, there's the question of quality. The Type 095 is expected to be quieter that the second tranche of Los Angeles-class attack submarines that were built in the late 1980s, and Russian Victor III or Akula-class submarines built in the early 1980s.
In other words, China is approximately 30 years behind the United States in submarine quieting technology. Chinese submarines in the 1980s were about as quiet as American submarines from the 1950s, while modern American submarines such as the Seawolf orVirginia-class boats are so quiet they're described as "quieter at 25 knots than the Los Angeles class at pierside." This is not a field where China has been able to close the gap.