| 标准 |
ASTM |
| 出生地 |
Hebei China (Mainland) |
| 技术 |
战争遗留爆炸物 |
| 合金或者不是 |
是合金做的 |
material: carbon steel material, alloy steel. standard: api 5l, api 5ct, astm a106 , astm a234, welding pattern: seamless, erw welding, lsaw welding , sprial welding and so on. Diameter: 8" and above.