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由中国石油和化学工业联合会技术装备办公室、中国化工学会化学工程专业委员会主办,上海怡涵展览服务有限公司承办的第四届中国(上海)国际蒸发及结晶技术设备展览会今天在上海新国际博览中心盛大开幕,以工业废水零排放工艺为主题,汇集参展品牌企业近200家,第一天专业观众3725人。