7302.10.10.10 - Standard tee rails over 30 kg per meter

This classification specifically covers standard tee rails made of iron or nonalloy steel, weighing over 30 kilograms per meter. These rails are intended for use in railway or tramway track construction. The emphasis on "standard tee rails" and the weight specification differentiates these heavy-duty components from other types of rails or track materials.

This category is distinct from its sibling "Other," which would encompass any rails not meeting the specific criteria of standard tee rails over 30 kg per meter. It also stands apart from other articles of iron or steel within Chapter 73 that are not directly related to railway track construction, such as structural shapes or pipes.

As this is a leaf node, there are no further subcategories. The classification hinges entirely on the accurate identification of standard tee rails with the specified weight. Practical classification will rely on verifying the profile of the rail (tee-shaped) and its weight per unit length against the 30 kg per meter threshold.