W一?/span>压力是一?/span>重要?/span>因素Q?/span>影响的质量的密封压力Q压?/span>的变?/span>Q?/span>周期?/span>Q?/span>损坏?/span>密封Ӟ?/span>挤压Q?/span>?/span>?/span>的媄(jing)响?/span>?/span>?/span>?/span>?/span>压力Q?/span>其他因素?/span>影响Q?/span>?/span>性能?/span>密封Q如温度Q速度Q?/span>密封材料Q?/span>zd?/span>气之间?/span>间隙Q?/span>?/span>间隙之间?/span>zd?/span>汽头?/span>