| 1. | Series of steel pipe size for petrochemical enterprise
石油化工企业钢管尺寸系列 |
| 2. | Rules for the inspection of steel pipe flangesfor export
出口钢制管法兰检验规程 |
| 3. | Replaceable cement pipe , cast iron pipe and steel pipe
可置换水泥管铸铁管和钢管 |
| 4. | Galvanized welded steel pipe for low pressure service
低压流体输送用镀锌焊接钢管 |
| 5. | Steel pipe welding neck flanges with male and female face
凹凸面对焊钢制管法兰 |
| 6. | Series of steel pipe size for petrochemical enterprises
石油化工企业钢管尺寸系列 |
| 7. | Stainless steel pipes for machine and structural purposes
机械和结构用不锈钢钢管 |
| 8. | Steel pipe welding neck flanges with tongue and groove face
榫槽面对焊钢制管法兰 |
| 9. | Welded steel pipe for supporting roller of belt conveyer
带式输送机托辊用电焊钢管 |
| 10. | Marine oval - shaped cast iron and cast steel pipe flanges
船用扁圆形铸铁和铸钢法兰 |
