1.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1992.
English | 7 CN |
2.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1992.
German | N 44(254) CN 7 |
3.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1993.
English | 7 CN |