Such as, castings of machine industry, bagging operations, abrasive operations, sandblasting, powder inject operations, drilling operations, plexiglass processing operations.

• 如：铸铁件的机械加工业，装袋作业，研磨作业，喷砂作业，粉末投放作业，钻孔作业，有机玻璃加工作业等。