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active redundancy
auto.	可靠性工作储备
busin.	活动冗余
el.mach.	工作储备; 使用裕度; 运行裕度
IT	主动［活动］冗余
reliabil.	★ 工作冗余
space	主动式冗余
tech.	主动冗余; 工作储［贮］备
telecom.	有效冗余度

active redundancy : 6 phrases in 3 subjects

Electric machinery	1
Space	4
Technology	1