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上海海隆石油钻具取得在螺纹部分设有密封装置的钢管螺纹接头专利
金融界2024年11月8日消息,国家知识产权局信息显示,上海海隆石油钻具有限公司取得一项名为“在螺纹部分设有密封装置的钢管螺纹接头”的专利,授权公告号 CN 116066637 B,申请日期为 2023年3月。
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