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波导活塞
 波导 活塞
tech. waveguide plunger
| 衰减器
 衰减 器
gen. attenuator
 衰减器
gen. dimmer
el. meas.inst. attenuator
eng.geol. compressor
oil attenuation
space pad
tech. attenuater; attenuation pad; attenuating pad

to phrases
波导活塞
tech. waveguide plunger
波导活塞
: 2 phrases in 1 subject
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