| 1. | Aluminium and aluminium alloy butt - welding pipe fittings
铝及铝合金对焊接管接头 |
| 2. | Steel butt - welding pipe fittings for ordinary use
一般用途的钢制对焊管配件 |
| 3. | Steel butt - welding pipe fittings ; technical delivery conditions
对焊管接头.交付技术状态 |
| 4. | 1 steel butt - welding pipe fittings for ordinary use amendment 1
一般用途的钢制对焊管接头 |
| 5. | Metal ball valves - flanged and butt - welding ends
对焊和法兰端金属球阀 |
| 6. | 1 steel plate butt - welding pipe fittings amendment 1
钢板制对焊管接头 |
| 7. | Method of x - ray radioscopy for butt - weld
对接焊缝x射线实时成像检测法 |
| 8. | Unalloyed titanium and titanium alloy butt - welding seamless pipe fittings
钛制对焊无缝管件 |
| 9. | Standard specification for steel line pipe , black , furnace - butt - welded
炉对焊黑色钢管线的标准规范 |
| 10. | 1 steel butt - welding pipe fittings amendment 1
钢制对焊管接头 |
