... .Steel castings 2.material carbon steel 3. Class NK Output shaftEfficiency: Annual output of more than 10,000 tons of steel-castingMain Product ... use apply to vessel use.(2) Parts for steam turbine.(3) Straight Bollard, bend Bollard,bell mouth,chock etc, for mooring ... declared NK,DNV,BV,ABS,CCS,Germany classification society attestation. Output shaft