涌水钻孔止水装置

Release time:2018-05-15|Hits:

Patent Applicant:201293000015 200799014545

Type of Patent:发明

Application Number:201210517588.9

Number of Inventors:7

Service Invention or Not:no

Application Date:2012-12-05

Publication Date:2013-11-06

Authorization Date:2012-12-05