A smaller number have been scaled up and offered commercially, and these are detailed below. Theoretically, it could be scaled down to far smaller explosions, and require small shock absorbers. For very large works, this may again be scaled to a larger intermediate. During the 1980s and 1990s the industry was scaled back considerably. It was scaled back but less severely than originally suggested. Objects are scaled relative to that viewer. The submarine had to be scaled accordingly. This "secondary," was scaled down to very small size. Demand has increased for this massive breeding programme to be scaled back. As it relies on the donation from recovered patients it cannot be easily scaled up. A line segment therefore cannot be scaled up indefinitely. After the earthquake, the organization quickly scaled up plans. Often these will be scaled as Smith Charts. The initial order was scaled down to 96 machines. That number, however, was quickly scaled back.