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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 30829-2014 |
Shaped and round seamless steel tubes for oil derrick 石油井架用异型及圆形无缝钢管 |
China National Standards Shaped round seamless |
 English PDF |
| GB/T 25822-2010 |
Shaped and round seamless steel tubes for axle 车轴用异型及圆形无缝钢管 |
China National Standards Shaped round seamless |
English PDF |
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