Portable device for retracting and releasing underwater measuring instrument
Accurate positioning device for marine surveying and mapping
Floating equipment and method for ocean surface flow field monitoring
Seabed investigation equipment and method based on scientific investigation ship
Ship cable tension detection and automatic adjustment method and system
Snorkeling type aquatic organism and water quality monitoring device
Float type environmental water quality monitoring device
Underground river hydrogeological condition detection ball
Monitoring system based on marine ship safety and monitoring method thereof
Method for detecting sinkage of epoxy gasket of marine main engine
Inclined ladder for measuring space position of tail end of gangway ladder and measuring method
Hydraulic engineering detection instrument and operation method