The hydraulic actuators include that YGX series minisize hydraulic cylinders, LYG series hydraulic cylinders, the YG series hydraulic cylinders which was designed by Japanese JISB8354-1992 stan¬dard, FHSG series engineering hydraulic cylinders, CD series heavy hydraulic cylinders, Y —HG1 series metallurgical standard hydrau¬lic cylinders, special vehicle hydraulic cylinders and manufactured various non-standard hydraulic cylinders for clients* request.