The studying of 90 types tank and developing work to start in 1974, in 1977 that the part was made and the experiment work started. Called TK-X tank temporarily at that time, it means " the tank while testing ". The date of finalizing the design is postponed by 1990, so also call it 90 types tank. This tank makes 2 sample cars while carrying on completed car first time to trial-produce in 1982- 1984, have carried on the technological test. 1986- Carried on completed car the second time to trial-produce in 1988, made 4 sample cars, carried on the technological test in 1987- 1988, The new tank finalize the design in 1990 , go into operation immediately , of the same age to produce 30.

Specification