1. The maximum deviation is calculated at 60%, which is the same as that of the free field. Durability
in this case is calculated as 300,000 times repeated compressions.
2. When the deviation of the free field is 50%, durability is 1 million times repeated compressions.
3. At a temperature of 200°C the decrement of the free field is 2% (when 50% of it is used)
4. The AR size is classified as seven scales, which are further divided into a total of seventy-one kinds.