多層結構的實例
http://img248.imageshack.us/img248/9...pionl2gha5.jpg
http://i64.photobucket.com/albums/h1...acle_MK1-1.jpg
http://img208.imageshack.us/img208/9...000mkiifx4.jpg
http://img67.imageshack.us/img67/4531/tar01510cg6.jpg
http://img20.imageshack.us/img20/149...w483621hx8.jpg