CORC

浏览/检索结果: 共3条,第1-3条 帮助

限定条件    
已选(0)清除 条数/页:   排序方式:
Air-cooled laser device 专利
专利号: US9077142, 申请日期: 2015-07-07, 公开日期: 2015-07-07
作者:  XU, JIANQIU;  ZHANG, RUI;  HUANG, JINZI;  WANG, CONG
收藏  |  浏览/下载:13/0  |  提交时间:2019/12/24
Top tensioning type vertical pipe based stress joint, has stress joint unit whose top end is connected with bottom end of stress joint unit, where bottom end of stress joint unit is connected with underground well head system. 专利
申请日期: 2011-01-01, 公开日期: 2011-12-14
作者:  HUANG Y JIA X JIAO B LIU G SHA Y XU
收藏  |  浏览/下载:7/0  |  提交时间:2019/12/18
Carbonic acid ester-based cation gemini surfactant and preparation method thereof 专利
申请日期: 2009-01-01,
作者:  DONGQING XU;  JIAO XIA;  XIAOWEN ZHU;  QINGNAN CHEN;  ZHONGWEN PAN
收藏  |  浏览/下载:1/0  |  提交时间:2019/04/19


©版权所有 ©2017 CSpace - Powered by CSpace