Rail transport in the Soviet Union the Soviet Union collapsed. Twenty other stations were under construction in 1985. The country's rapid transit system was the most intensively used in the world. The Soviet Union was a pioneer in the development of the diesel locomotive to replace the steam locomotive (dieselization) on non-electrified lines. But the USSR failed to make steady progress and while they lead the United States at first, they soon fell behind and their last steam locomotives were retired about 15 years later than for the US. The first mainline diesel locomotive in the world began running in 1924 in the USSR but it
Collapsed vein Collapsed vein Collapsed veins are a common result of chronic use of intravenous injections. They are particularly common where injecting conditions are less than ideal, such as in the context of drug abuse. Veins may become temporarily blocked if the internal lining of the vein swells in response to repeated injury or irritation. This may be caused by the needle, the substance injected, or donating plasma. Once the swelling subsides, the circulation will often become re-established. Permanent vein collapse occurs as a consequence of: Smaller veins may collapse as a consequence of too much suction being used when pulling back