Text this: Improvement of the pad wear shape in fixed abrasive chemical-mechanical polishing for manufacturing optical components

 __   _    _    _     ______    _____    _____    
| || | || | || | ||  /_   _//  |  ___|| |  __ \\  
| '--' || | || | ||  `-| |,-   | ||__   | |  \ || 
| .--. || | \\_/ ||    | ||    | ||__   | |__/ || 
|_|| |_||  \____//     |_||    |_____|| |_____//  
`-`  `-`    `---`      `-`'    `-----`   -----`