华北五省市区铸造技术协作网于1988年9月12日至15日在北戴河召开了第六届年会暨技术交流交易会,通过成果信息发布、样本样品展示、供需双方见面等多种形式,大会发言50余人次,发布信息310多条,其中找到“对象”并达成意向的有40多 The five provinces of north China’s urban casting technical cooperation network held its sixth annual conference and technology exchange fair in Beidaihe from September 12th to 15th, 1988. Through various forms such as the release of results information, the demonstration of sample samples, the supply and demand sides, etc. , more than 50 people made speeches at the conference, more than 310 pieces of information were published, among which there were more than 40 of which “objects” were found and intentions were reached.