一种到界露天矿压煤井工开采方法（美国））

Release time:2023-12-26 Hits:

Affilication of Author(s):矿业工程学院

Scope of patent:国内

School Sign:第一单位

Disigner of the Invention:xiongjibing,孙道延

Type of Patent:国内

State of Patent:专利授权

Application Number:202210058939.8

Service Invention or Not:no

Application Date:2022-01-19

Authorization Date:2023-04-21

First Author:chenshuzhao