An object is to improve the cleanness achieved by washing through effectively suppressing the residual of solvent remained on a wash-target after washing. Initially, there is a plurality of images associated with sound sequences, these images are for example taken using a camera, this camera having recorded the ambient sound at the time of taking the photograph. Which lower portion is formed into a hook or is wrapped around a pivot as a swivel eyelet. A second substrate is polished on the first platen using an adjusted polishing parameter calculated based on the first fitted function and the second fitted function.