Patents
一种煤矿井下锚杆预紧安装微震传感器的方法
Release time:2021-12-09
Hits:
- Type of Patent:
- 国家发明专利
- State of Patent:
- Authorized patents
- Application Number:
- CN201910886033.3
- Service Invention or Not:
- no
- Application Date:
- 2019-09-19
- Authorization Date:
- 2021-03-26
Next One:一种基于组合结构的微震传感器可回收式安装罩体及方法
