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Gas content measuring device used in an underground coal mine
- Release time:2020-10-30
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Disigner of the Invention:
Qingquan Liu,maxiaohang,anhaoxue,yufeiyang,miaohangType of Patent:
Utility modelsState of Patent:
专利授权Application Number:
CN 201920418054.8Authorization number:
ZL 201920418054.8Number of Inventors:
6Service Invention or Not:
noApplication Date:
2019-03-29Authorization Date:
2019-12-31First Author:
lvbiao