CN216446861U - 一种不锈钢包覆的抗腐蚀耐疲劳抽油杆 - Google Patents
一种不锈钢包覆的抗腐蚀耐疲劳抽油杆 Download PDFInfo
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- CN216446861U CN216446861U CN202121966992.5U CN202121966992U CN216446861U CN 216446861 U CN216446861 U CN 216446861U CN 202121966992 U CN202121966992 U CN 202121966992U CN 216446861 U CN216446861 U CN 216446861U
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CN202121966992.5U CN216446861U (zh) | 2021-08-20 | 2021-08-20 | 一种不锈钢包覆的抗腐蚀耐疲劳抽油杆 |
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CN202121966992.5U CN216446861U (zh) | 2021-08-20 | 2021-08-20 | 一种不锈钢包覆的抗腐蚀耐疲劳抽油杆 |
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Inventor after: Liu Yiliang Inventor after: Liu Yichen Inventor after: Liu Yihe Inventor after: Sun Jiaxing Inventor after: Liu Guoguang Inventor after: Liu Wenhao Inventor before: Liu Yiliang Inventor before: Liu Yichen Inventor before: Liu Yihe Inventor before: Sun Jiaxing Inventor before: Yu Fazhen Inventor before: Liu Guoguang Inventor before: Liu Wenhao |
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