短語詞組短語constant failure rate distribution 常數(shù)故障率分佈Constant failure rate dustribution 恒常失傚率分配constant failure rate periodyn 恒定失傚率期constant failure rate period [電]恒定失傚率期constant failure rate portion 恒定故障率工作期constant failure -rate period 正常工作時間MONK constant failure rate period 恒定失傚率期 返回 constant failure rate