north face sunglasses the Seawolf-class attack submarines to 95 decibels

military experts praised as a China's 091 Han-class attack submarines and 092 summer class missile submarine submerged noise early, even up to 160 dB and 165 dB, after years of improvement is still as high as 150 and 155 decibels. U.S. military experts have wryly: 120 db with the United States, the Los Angeles-class attack submarines, the Seawolf-class attack submarines to 95 decibels, and the Ohio-class missile submarines 100 db or far apart. Contemporary sonar technology, noise each reduced by 15 dB, the detection distance will be reduced to 50% to 70%. This visible the submarines quiet technology major significance,air jordans 4.
China's submarine engineering and technical personnel have long made unremitting efforts to reduce the noise. In the context of military research and huge investment and research environment has greatly improved in recent years, has made a major breakthrough, the invention of They absorb the Russian The bionics have long been inspired from the fish's body,north face sunglasses, the British modeled dolphins skin, veneer materials to produce the kinds of boats, numerous rubber small column in the middle of the second floor of rubber, the gap filled with a kind of liquid. Paste it in contact with water surface speedboat speedboat high-speed sailing close to the hull of the water flow line is very smooth, can improve the speed. Jaws of bionics home study, epidermal erected small thorn piece (fishermen can use sharkskin polished wood), these small barbed piece of the plane all along the water's flow line. Jaws is advancin