日期:2023-06-28~2023-06-30
nt:a variety of surface underwater search and rescue new products and new technology equipment, underwater communication equipment and instrumentation, various types of navigation and positioning equipment and instruments, a variety of underwater observation and detection equipment and instruments water drones boat, a variety of underwater cutting, welding and cleaning equipment, manned submersible, underwater remote control equipment, air and mixed gas diving equipment, saturation diving equipm