期货合约代码表 http://wenku.baidu.com/link?url=tSDHwkZ8jxPshAShLtIEsI77CBSpWMO7eqNd1yn0LdOVH6KMwvBm83dm9FaPrUUBFgAVzo_arzwV0_NZI21fVetJUowvpcx2wQU0ZFhlmh3