电液锤液气缸活塞密封采用由PTFE制造的格莱圈密封，在使用中液压油会窜入气腔，导致气体压力升高。
After PTFE Glyd ring was used in piston seals of hydraulic cylinder of electro-hydraulic hammer, the gas pressure rose because oil entered into gas chamber.
由于增加了气囊，管柱接箍通过胶筒时，液压腔内的压力升高很少。
Since the gas bag is added, the pressure increase within the hydraulic chamber is very slight when the string collar passes through the packing element.
在满足要求的前提下适当增加多级液压油缸的级数，可以使提升高度增加更多。
In precondition of satisfying requirement, lifting height may be increased more by increasing stages of multi-stage hydraulic cylinder.
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