Failure rate data of heating network components of Beijing and Shenyang could be taken as a reference for reliability research of heating networks in China.
北京和沈阳热网元件故障率可作为我国热网可靠性研究的参考数据。
The result shows that even without strength degeneration, the reliability and failure rate of components decrease with time.
研究表明，即使强度不退化，零件的可靠度和失效率也会随时间逐渐降低；
The replacement of some equipment's components makes it in partial update state. The equipment's residual life with such characteristic cannot be calculated by using unit failure rate model.
维修中对设备零部件的更换，使其经常处于局部更新状态，按单元的故障率模型无法计算具有这种特点设备的剩余寿命。
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