 |
 |
 |
| National
new product |
National
"Torch-Plan Item" |
Papers
of National Science Comm. |
 |
 |
 |
| Certificate
of Petrochemical Corp.of China |
Papers
of Chemical Ministry |
Certificate
of China Chem.Eqpt.Corp. |
 |
 |
 |
| Patent
of metal meshed-PTFE |
Patent
of vacuum PTFE liner |
Patent
of butterfly valve |