一种到界露天矿压煤井工开采方法（美国））

Release time:2023-12-26 Hits:

School Sign:第一单位

Disigner of the Invention:汤万钧,杨猛

Type of Patent:国内

State of Patent:专利授权

Application Number:US 11,821,314 B2

Service Invention or Not:no

Application Date:2022-01-26

Authorization Date:2023-11-21

First Author:chenshuzhao