| 摘要 |
PURPOSE:To prevent fatigue rupture due to the generation of repetitive stress of a testing tank by applying constant static pressure to the testing tank. CONSTITUTION:The pressure in the testing tank 1 is held invariably equal to maximum pressure as to a test by a pressure device 9 and a control board 8. Then, the pressure impressed into a body 2 to be tested is varied according to a set program by switching pressure generated by a pump unit 4 through a selector valve 3 controlled by the operation control board 5. Consequently, specific pressure is applied repeatedly to the body 2 to be tested. |
