The Chinese 50 ton type 82 tank transporter also as the HY473 heavy equipment transporter (HET) was developed in the early 1980s by Hanyang Special Vehicle Manufactory to transport, deploy, and evacuate 50 tons payloads, including main battle tanks, light tanks, armoured combat and transport vehicles, and large engineering equipment, as well as towing the DF-21 medium-range surface-to-surface missile transporter-erector-launcher (TEL) semitrailers. The HY473 HET consists of a HY473 6X6 truck (tractor) and a HY962 6-wheel semitrailer. Early variants are powered by an air-cooled 261.1 kW F12L413F-V diesel engine, with a maximum road speed of 64 km/h. Later variants are powered by a more powerful water-cooled, turbo-charged BF6M1015CP diesel engine, increasing its max load to 75 tons. The transmission system is based on German and Japanese heavy lift truck technologies.?