China technology Lada-class

It is designed Lada class submarine, mainly as a sub browser, but is also equipped for surface warfare and defense of the naval base. Ship carrying a crew of between 34 to 38, with a displacement of 1760 tons of surface and underwater speed of 39 kilometers per hour. It is designed to stay under water for 45 days and can travel about 10,000 miles. Use paint and tile sub new boat on its outer surface and a quieter fan, and said eight times quieter than its predecessor, and Kilo class absorbs sound. The ship has been redesigned several times after failing basic tests in 2014

China 2014 Tianjin International Dredging

With the development of economic globalization, has seen the rapid growth of international trade, and the number of large vessels to grow remains. In order to improve navigation capabilities and allow the berthing of large container ships and oil tankers and ports in the world, and to broaden and deepen the basin and the sea lanes of the port, which will certainly boost infrastructure and dredging the size of maintenance dredging.