CN206477825U - 一种可提高冲程的有杆泵结构 - Google Patents
一种可提高冲程的有杆泵结构 Download PDFInfo
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Effective date of registration: 20181207 Address after: 710200 No. 8-101 Jingwei Small and Medium-sized Industrial Park, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee after: XI'AN SIJIANGDE EQUIPMENT MANUFACTURING CO., LTD. Address before: 100000 Beijing Chaoyang District Wangjing North Road No.9 Building 5-storey C505 Patentee before: Beijing Huayuan Zhongke Technology Co., Ltd. |
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Effective date of registration: 20210729 Address after: 451162 2nd floor, building 1, smart terminal mobile phone industrial park, intersection of Huaxia Avenue and Donghai Road, Hangkong port area, Zhengzhou City, Henan Province Patentee after: Zhengzhou Coal Machinery Intelligent Working Face Technology Co.,Ltd. Address before: 710200 No. 8-101 Jingwei Small and Medium-sized Industrial Park, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: XI'AN SIJIANGDE EQUIPMENT MANUFACTURING Co.,Ltd. |