应美国波特兰水泥协会主席约翰·格里森的邀请,中国建筑材料工业协会副会长、中国水泥协会理事长雷前治于2003年1月率团访问了美国波特兰水泥协会。在中国水泥协会与美国波特兰水泥协会进行了深入的友好会谈后,双方一致同意签署合作协议,以更好地促进两国企业之间的贸易往来和 At the invitation of John Gleason, chairman of Portland Cement Association, Lei Qizhi, vice chairman of China Building Materials Industry Association and chairman of China Cement Association, led a delegation to visit the Portland Cement Association in January 2003. After the China Cement Association conducted in-depth and friendly talks with the Portland Cement Association of the United States, the two sides unanimously agreed to sign a cooperation agreement to better promote trade between enterprises of the two countries and