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例行维护
gen.	routine
el.	routine service
IT	routine maintenance
tech.	maintenance routine; routine maintenance (保养); scheduled maintenance
例行维护修，保养
auto.	routine maintenance
例行临时技术维护
auto.	running service
例行日常维护
auto.	light maintenance
例行维护修
auto.	routine servicing

例行维护: 6 phrases in 5 subjects

Economy	2
Electronics	1
Hydroelectric power stations	1
Technology	1
Telecommunications	1