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水平逆流式旧砂再生机郭景纯（昆明理工大学云南昆明市：６５００９３）主题词：旧砂再生机，实用新型专利专利号：ＺＬ９４２２２３４４．６；申请日：１９９４．０９．２６；公告日：１９９５．０７．１２；专利权人：郭景纯；公告号：ＣＮ２２０３１９９Ｙ本实用新型专...
Horizontal countercurrent old sand regenerator Guo Jingchun (Kunming University of Science and Technology Kunming, Yunnan: 650093) Key words: old sand recycling machine, utility model patent number: ZL94222344.6; application date: 1994.09.26; announcement day: 1995. 07.12; patentee: Guo Jing Chun; Publication Number: CN2203199Y The utility ...