Watertight springboard door equipment for lightering operation between roll-on-roll-off ships
Novel two-way opening and closing gangplank door equipment for roll-on-roll-off ship
Floating dock electro-magnetic suspension lifting system based on load self-balancing
Dynamic self-adjusting floating dock supporting system
Wave blocking slope plate device for amphibious operation of roll-on-roll-off ship
Gas-electricity graded heating system for freezing prevention of polar region ship stairs