1) Flexing test machine:a. The flexing angle is between 0°-55°b. The flexing frequency is between 100 – 300 times per minutec. The sample should be fixed tightly and won’t move during test. The flexing angel of clamp should be adjustable to make sure the sample can stay at a natural status at any time.d. Machine should be able to shutdown automatically with preset flexing timese. Machine should be capable to blow air to test samples