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DF-31
The Dong Feng 31 (; NATO reporting name CSS-9) is a long-range, road-mobile, three stage, Solid-fuel rocket intercontinental ballistic missile (ICBM) in the Dongfeng missile series developed by the People's Republic of China. It is designed to carry a single 1-megaton thermonuclear weapon. It is a land-based variant of the submarine-launched JL-2. It is operated by the Second Artillery Corps (SAC) which, in 2009, was estimated to have under 15 DF-31 missiles and under 15 DF-31A missiles in inventory.〔 It is not known how many missiles of this type the SAC currently has.
The DF-31A is believed to have incorporated many advanced technologies similar to current generation Russian ICBMs, including the use of penetration aids such as decoys or chaff and maneuverable reentry vehicles to complicate enemy's missile warning and defense system.
== History ==
The PRC began developing the DF-31 as a second-generation ICBM successor of the DF-4 in January 1985. ARMT (then called the 4th Aerospace Academy) was appointed as the main contractor while the research arm of the Second Artillery Corps provided contributing support. The land-based variant of the JL-2 was originally called the DF-23 but was changed later on to the DF-31 because of a change in operational requirements. In 1999, the missile was first displayed publicly at the National Day Parade.〔The Federation of American Scientists &
The Natural Resources Defense Council (DF-31A) Nov, 2006. 73 (PDF)()〕 On August 2, 1999, the Chinese state news media reported the successful test of the DF-31.〔 The third test flight of the missile occurred on November 4, 2000; the second test flight had taken place earlier that year. Operational deployment of the missiles reportedly began in 2006. In 2009, US Air Force Intelligence reported that under 15 DF-31 missiles had been deployed.〔US Air Force Air and Space Intelligence Center, Ballistic and Cruise Missile Threats 2009 ()〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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