730411 |
Line pipe of a kind used for oil or gas pipelines |
730419 |
Other |
730422 |
Casing, tubing and drill pipe, of a kind used in drilling for oil or gas |
730423 |
Other drill pipe |
730424 |
Other, of stainless steel |
730429 |
Other |
730431 |
Other, of circular cross-section, of iron or non-alloy steel |
730439 |
Other |
730441 |
Other, of circular cross-section, of stainless steel |
730449 |
Other |
730451 |
Other, of circular cross-section, of other alloy steel |
730459 |
Other |
730490 |
Other |