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机械疏浚学组与情报网于1991年10月8日至12日在河北省保定市召开了第八次疏浚与吹填技术经验交流会。参加会议的有水利水电、交通航道系统等82个单位,计127位代表,香港政府拓展署亦派二位先生参加了会议。代表还参观了保定塑料总厂,看了φ710mm大口径硬塑料生产线。本次大会重点交流“以塑代钢”的研究成果。会议认为,全国每年排泥管耗用钢材几万吨,通过试验,壁厚20.7mm塑料管为壁厚
Mechanical dredging group and intelligence network in October 8, 1991 to 12 in Baoding, Hebei Province held the eighth dredging and filling technology experience exchange. Attending the meeting were 82 units of water conservancy and hydropower, traffic and waterway system, 127 delegates and Hong Kong’s Governmental Development Agency. Two other gentlemen attended the meeting. Representative also visited the Baoding Plastic Factory, saw φ710mm large diameter hard plastic production line. The meeting focused on exchange “to plastic steel” research results. The meeting held that the national annual mud tube consume tens of thousands of tons of steel, through the test, the wall thickness of 20.7mm plastic pipe wall thickness