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Loading and unloading bracket for installation and disassembly of micro-seismic sensor, has long shaft including end nut, washer, and long screw whose other end is provided for connecting with end of sensor. 专利
申请日期: 2018-01-01, 公开日期: 2018-05-08
作者:  MA T TANG C KONG D
收藏  |  浏览/下载:3/0  |  提交时间:2019/12/02


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