最近十多年来,国内经济快速发展,改制后企业种类多(国有、股份、私有、中外合资等),出现一百多家生产振动筛企业,市场上筛机结构形式多,技术、质量水平参差不齐。国外筛机制造公司在强大经济资助下,技术开发、加工能力稳步发展。1筛机大型化问题国内学者谈筛机发展必谈大型化,? Over the past decade or so, with the rapid development of the domestic economy and the large number of enterprises (state-owned, joint-stock, private, Sino-foreign joint ventures, etc.) after the reform, more than 100 vibrating screen manufacturers have emerged. The market has many forms of sieve machines and their technical and quality levels Spotty. Foreign screen machine manufacturing company with strong financial support, technology development, processing capacity steady development. A large screen machine problems Domestic scholars talk about the development of large screen machine ,?