The trans-siberian railroad remains the most important transportation network in the region and annually services more than 57 million tons of freight, mostly timber, coal, oil products, ferrous and nonferrous metals, and construction materials.
(The trans-siberian railroad; remains; the most important transportation network in the region and annually services more than 57 million tons of freight)
The trans-siberian railroad
remains
the most important transportation network in the region and annually services more than 57 million tons of freight