Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Wang Hejian"'
Publikováno v:
Meikuang Anquan, Vol 52, Iss 9, Pp 157-160 (2021)
Aiming at the problem of low drilling technology in rescuing trapped persons in coal mine accidents, the factors affecting fast drilling are analyzed. By rescue vehicle rig modular and intelligent technology, we developed a fast twist drill discharge
Externí odkaz:
https://doaj.org/article/7d4b6c853eac4353a0a837d0f858e516
Publikováno v:
MATEC Web of Conferences, Vol 153, p 04001 (2018)
The coal-bed methane (CBM) as a kind energy is clean and efficient, also it can become a security risk in mining process if it could not get out of the coal seam. In view of the current large-scale exploitation of coal-bed methane resources, the deve
Externí odkaz:
https://doaj.org/article/5f21e2c6c3f44132a23fec3000ca12df
Publikováno v:
In Chinese Journal of Aeronautics August 2024 37(8):63-78
Publikováno v:
In Chinese Journal of Aeronautics June 2024 37(6):109-126
Publikováno v:
In Aerospace Science and Technology September 2023 140
Publikováno v:
In Aerospace Science and Technology April 2023 135
Publikováno v:
In Aerospace Science and Technology February 2023 133
Publikováno v:
In Aerospace Science and Technology December 2021 119
Publikováno v:
In Engineering Geology January 2021 280
Autor:
Yu, Daolun, Zhang, Li, Wang, Hejian, Chen, Fanghui, Chen, Jie, Zhang, Zongmeng, Li, Jie, Xing, Chaofeng, Li, Honglin, Li, Jun, Cai, Yafei
Publikováno v:
In Theriogenology 1 September 2019 135:204-212