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周期振动
eng.geol. periodical vibration
oil periodic oscillation
space cyclic vibration
tech. period of vibration
wind. periodic vibration
周期振动
: 55 phrases in 14 subjects
Agriculture1
Automobiles3
Aviation3
Bridge construction2
Construction1
Desert science3
Electric machinery1
General2
Hydroelectric power stations4
Metallurgy6
Nautical1
Otorhinolaryngology1
Space7
Technology20