| 1. | Hf hanguan processing , steel wholesale and retail
高频焊管加工，钢材批发兼零售。 |
| 2. | A research for the residual stresses in welded pipes
焊管的残余应力测试与研究 |
| 3. | High frequency induction heating equipment used in
焊管用单管高频感应加热设备 |
| 4. | 21 mpa slip - on welding pipe flanges for hydraulic use
21 mpa液压用平焊管法兰 |
| 5. | Specification for welded nickel - iron - chromium alloy pipe
镍铁铬合金焊管规范 |
| 6. | Flare type and brazing type fittings for refrigerants
致冷剂用喇叭口型和硬铜焊管接头 |
| 7. | Hanguan production , marketing , sales metal materials
焊管生产、销售，金属材料销售。 |
| 8. | Cutter adapters ' design of facing weld steel tubes
焊管端面加工刀盘设计初探 |
| 9. | Steel butt - welding pipe fittings for ordinary use
一般用途的钢制对焊管配件 |
| 10. | Specification for nickel - iron - chromium - silicon alloy welded tube
钼铁铬硅合金焊管规范 |
