Muddy water imaging remote-control unmanned submersible and design method thereof
Safety gear reset device, elevator and safety gear reset method
End beam buffer device for electric single-beam crane
Ship draft detection method based on parallel multi-beam sonars
Ship hydraulic steering engine follow-up steering control method
Generator end cover hoisting tool and using method thereof
Method for multi-point control over full-revolving steering oar through multi-electric-shaft handle
Oil consumption, driving track and safe driving integrated remote monitoring system
Shake-reducing device of multi-purpose ship liquid oil tank
Charging pile facilitating installation of charging gun
Method for assisting portal crane to quickly align to container by adopting laser ranging rod