Multiple V-ring packing, combined with live loading, maintains packing compression under high-cycle and severe service applications.
多重V形环填料，组合动负载，维护填料压缩，适用于使用频率高，环境严酷的应用场合。
2
Influence of rare earth elements on high-cycle fatigue properties of AZ91D alloy was investigated and the fatigue fracture morphology was also analyzed.
研究了稀土元素对AZ 91 D压铸镁合金高周疲劳性能的影响，并对疲劳断口的组织形貌进行了分析。
3
The highcycle rate of the valves, and the abrasive nature of the quartz powder require an abrasion resistant valve that will last.