Unmanned early warning ship for marine natural disasters
Rudder blade detection hole cover plate and manufacturing method thereof
Ship with protection cover that can be easily attached to and detached from a coaming part
Transverse connecting structure and method for metal sandwich strong deck and bulwark strake
Ship deck outfitting piece reverse-state installation device and reverse-state installation method
AUTONOMOUS MOTORISED MONOHULL SHIP WITH WEIGHTED KEEL TRANSFORMABLE INTO A TRIMARAN