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运行周期
agric.	run duration
avia.	sidereal period
el.	cycle length; duration of working cycle; operation cycle; operating cycle
el.mach.	cycle of operation
space	revolution period; period of revolution; orbital period
tech.	operational period; performance period; running cycle; running period
water.res., ecol.	operating period
客运运行周期
auto.	bus run cycle
运行〔轨道〕周期
commun.	orbit time
天体运行周期轨道
scient.	circle
运行〔轨道〕周期
space	orbit period
绕轨道运行周期
astronaut.	orbital period
汽车运行周期
auto.	cycle of operations

运 行周期 : 29 phrases in 9 subjects

Automobiles	2
Electric machinery	4
Electronics	3
Metallurgy	3
Rail transport	3
Space	2
Technology	10
Telecommunications	1
Transport	1