... a suspension fork structure (GDM-1: 6 press springs, 8 pullsprings; GDM-4: 8 press springs,8 pull springs.) which enhances the ... -4FeatureSingle-speed,Single-vesselSingle-speed,Single-vesselTwo- speed,Single-vesselFrequency conversion,Single-vesselSingle-speed,Four-vesselCharging granularity≤5mmDischarging granularity≤80μmVessel ...