Carbon pressure ball machine device is a hydraulic pump hydraulic protection will be high pressure oil into the hydraulic cylinder, driving the piston produce axial displacement.
碳素压球机液压保护装置是由液压泵将高压油打入液压缸，使活塞产生轴向位移。
2
When the technique is applied to an oilpump in diesel engine, 3-d displacement fields of the pump are successfully measured.