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浏览/检索结果: 共5条，第1-5条 帮助 限定条件 内容类型：专利     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Preparation of delta-lactone comprises adding successively palladium catalyst, additives and solvent to autoclave, cooling, adding 1,3-butadiene, charging with carbon dioxide, sealing, reacting, cooling, and separating reaction solution. 专利 申请日期: 2016-01-01, 公开日期: 2016-06-01 作者:  BAO M FENG X SONG J 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/09 Environment-friendly water treatment agent and preparation method thereof 专利 申请日期: 2014-01-01, 作者:  XIANG FENG;  HE YINGXIA;  ZHANG JIAN AN;  WU MINGYUAN;  WU QINGYUN 收藏  |  浏览/下载：14/0  |  提交时间：2019/04/19 Folding-type bicycle for elder people, has lower bracket shaft passing through sliding arc-shaped sheet main body, and triangular-shaped structure is provided with support sheet of slide rail mounting beam. 专利 申请日期: 2014-01-01, 公开日期: 2014-07-09 作者:  LIU S SONG H FENG X 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/11 Vortex vibration restraining method for underwater pipe in abyssal environment, involves installing main pipe with control rods at hundred and twenty degrees circumferentially, and providing main pipe annular sleeve in annular sleeves. 专利 申请日期: 2009-01-01, 公开日期: 2009-04-29 作者:  FENG W FU Y LI G LV L SONG J TENG B 收藏  |  浏览/下载：2/0  |  提交时间：2019/12/24 Parallel connection type hybrid power system for communication transportation field. 专利 申请日期: 2005-01-01, 公开日期: 2005-09-07 作者:  LONG W FAN L FENG L SU X SONG P 收藏  |  浏览/下载：2/0  |  提交时间：2020/01/02