Magnetic separator machines for chemical processing designed to remove sludge from coolants discharged into coolant tanks for machine tools and other industrial machines; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for metal working machines; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for mining machines and apparatus; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for construction machines and apparatus; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for loading-unloading machines and apparatus; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for chemical processing machines and apparatus; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for food processing machines and apparatus; sludge removal equipment in the nature of extracting machines used to remove sludge from tanks by magnetic force for beverage processing machines and apparatus; sludge collecting machines in the nature of sorting, separating, filtering and extracting machines and structural parts therefor for chemical processing; sludge collectors in the nature of extracting machines being parts of metalworking machines; sludge collectors in the nature of extracting machines being parts of mining machines and apparatus; sludge collectors in the nature of extracting machines being parts of construction machines and apparatus; sludge collectors in the nature of machines for separating target materials from mixtures being parts of loading-unloading machines and apparatus; sludge collectors in the nature of separating machines being parts of chemical processing machines and apparatus; sludge collectors in the nature of machines for separating target materials from mixtures being parts of food processing machines and apparatus; sludge collectors in the nature of machines for separating target materials from mixtures being parts of beverage processing machines and apparatus; metalworking machines namely machining centers and metalworking machine tools; mining machines; concrete and road construction machines; loading-unloading machines; sorting, separating, filtering and extracting machines for chemical processing; filtering machines for chemical processing; electric food processing machines; beverage processing machines; machines for manufacturing semiconductors; electric wax-polishing machines for industrial purposes; vacuum cleaners for industrial purposes; waste compacting machines for industrial purposes; waste crushing machines for industrial purposes