１９９９年６月１７日广西农机化局以桂农机科（１９９９）１２号文，同意区农机鉴定站《关于暂时收回都安县华联机械厂等２４家企业小型多功能拖拉机产品技术鉴定证书的请示》的意见。被收回技术鉴定的证书的厂家是由于自产品通过技术鉴定后，有的已经停产或转产；有的转... On June 17, 1999, the Bureau of Guangxi Agricultural Mechanization agreed with No. 12 of the Guangxi Agricultural Mechanization Division (1999), agreeing to the request of the district’s agricultural appraisal station “on the temporary recovery of the 24 small-scale multi-functional tractors technical appraisal certificate of Hualian Machinery Factory of Duan County. "Views. The manufacturers of certificates that have been reclaimed for technical appraisal are due to the fact that some products have been discontinued or converted since the product passed the technical appraisal;