Main cylinder and traversing cylinder for A-frame requires high load capacity and high corrosion resistance; 1 ea of

cylinder requires approximately over 800 tons of maximum output.

As the A-frame installed in the stern of ship with high corrosion resistance is mainly used for underwater missions and

thus the cylinder is exposed to the seawater for a long period, it is designed and manufactured to have high corrosion

resistance and also stress analysis is performed to achieve high load capacity. After drawing approval and product

inspection by the ship's classification organization, the products are delivered to customers.