期刊： MECHANICAL ENGINEERING JOURNAL, 2021; 8 (3)
Aiming at the problem of dislocation at the junction of metro carriages, a three DOF (degree of freedom) coupled vibration model of the junction of me......
期刊： MECHANICAL ENGINEERING JOURNAL, 2021; 8 (2)
Annular Blowout Preventer (BOP) is the core device for snubbing service in gas wells. The wellhead can be sealed by operating the BOP. Rubber core of ......
