In shiprepair and shipbuilding line ,derusting of ships structure and hull adopts traditional ways like hand chipping, scraping and pneumatic sand blasting, the shortcoming is that they pollute the environment severely.

• 在修造船行业中；船舶的构件和船壳的除锈；其传统工艺是采用手工拷铲和气动磨料喷射的方法；它们的致命弱点是严重污染环境.