CN208712440U - 一种机械清管器降速结构 - Google Patents
一种机械清管器降速结构 Download PDFInfo
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Effective date of registration: 20221214 Address after: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Patentee after: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee after: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY Co.,Ltd. Address before: No. 6, Dongzhi gate, Dongcheng District, Beijing, Beijing Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Patentee before: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee before: CNOOC PETROLEUM TECHNOLOGY DETECTION CO.,LTD. |