Title:一种具有阶梯刃型的断屑钻头
Institution:机械工程学院
Type of Patent:Utility models
Application Number:201620801116X
Number of Inventors:2
Service Invention or Not:No
Application Date:2016-07-28
Publication Date:2017-01-18
Authorization Date:2017-01-18
Release Time:2019-04-15