一种双锥角断屑钻头

Release time:2019-04-15|Hits:

Affilication of Author(s):机械工程学院

Patent Applicant:guokai,sunjie

Type of Patent:实用新型

Application Number:2016210799890

Number of Inventors:2

Service Invention or Not:no

Application Date:2016-09-26

Publication Date:2017-04-12

Authorization Date:2017-04-12