certificate of classification meaning in Chinese

船舶船级证明
船舶船级证书
船级证书

The anticorrosion painting is one of the key products of our factory . the th - 1 and th - 2 type zinc silicate coating for marine type obtain the ship examination certificate of classification society , the th - 22 type modified epoxy pitch glass squama coating obtains the ccs ship examination certificate
防腐涂料是我厂的重点产品之一，我厂生产的th - 1 、 th - 2型硅酸锌船用涂料获多国船级社的船检证书， th - 22型改性环氧沥青玻璃鳞片涂料获ccs船检证书。