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Retractable collimating seat on both sides of cylinder, has top diversion block which is fixed at top end of telescopic section where upper surface of top diversion block is slope inclined downward from end of column to end of far column. 专利
申请日期: 2018-01-01, 公开日期: 2018-06-26
作者:  MA Y ZHAO Y TENG L
收藏  |  浏览/下载:3/0  |  提交时间:2019/12/02


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