If the Arab oil-weapon felt like a hammer-blow, this time stagnant oil output and growing emerging-market demand have squeezed the oil market like a vice.
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.
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。
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Oil gas diffusion can probably occur from the product pipeline due to some factors such as pipe corrosion, foreign power collision, oil stolen by drilling hole or water hammer.