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nonscheduled maintenance
 nonscheduled maintenance
space 非预定维修
| time
 time
el. sec.sys. tE时间
manag. 期限
oil 时间
phys. 持续时间
tech. 时间; ; ;

to phrases
nonscheduled maintenance
space 非预定维修
nonscheduled maintenance: 5 phrases in 3 subjects
Agriculture1
Metallurgy2
Telecommunications2