参考文献:
GRÜNENTHAL GMBH FRANK, Robert CHRISTOPH, Thomas SCHIENE, Klaus DE VRY, Jean DAMANN, Nils LESCH, Bernhard BAHRENBERG, Gregor SAUNDERS, Derek John STOCKHAUSEN, Hannelore KIM, Yong-Soo KIM, Myeong-Seop LEE, Jeewoo Patent: WO213/81 A1, 213 Location in patent: Page/Page column 11