1.structure: piston cylinder 2.power: hydraulic 3.brand name of seal components: NOK 4.usage:oil 5.application: excavator 1, ... serviced offered2,the details of production3, seal components (from korea and Japan)4,about us· Professional and thorough analysis and ... management methods· Imported cushion,sealing element,oil pipe and other components· Holds Many Patents· High quality, high reliability, high ...