Description Structure Frame structure with qualitative treatment for strong stability. Vertical balance acupuncture transmission mechanism for stable operation. Magnesium alloy needle plate composite PU with airbag locking positioning. High-strength U-shaped stripping plate. Main shaft constructed with a large fuel tank and protected by an automatic lubrication and cooling system. Technical Specifications Frame: 2000-9200 mm. Needle density: 4000-8300 needles/m. Acupuncture: 30-60 mm. Acupuncture frequency: 800-1200 times/min.