Patent No. ZL 2004 3 0106061.3
Patent No. ZL 2004 3 0106432.8
Patent No. ZL 2004 3 0106062.8
Patent No. ZL 2004 3 0106431.3
Patent No. ZL 2004 3 0107497.4
Patent No. ZL 2005 3 0105497.5