Underwater sonar detection device suitable for seabed drilling
Underwater detection device based on multi-beam sonar and offshore ad hoc network buoy
Submersible locking mechanism and operation method thereof
Sonar surveying and mapping system based on surf algorithm
Ship abutting berthing device and berthing method thereof
Seating-system kits and methods of configuring seating systems
Overwater distance surveying instrument for surveying and mapping based on Beidou system
Maritime emergency communication buoy for retrieving marine survey equipment