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声源到控制点的传播路径上,设置消声器前与后的控制点的声压级差值,或者采用消声器措施前与后的声源对外辐射噪声的声功率级差值。
Physics
>声学>声学材料>释义
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three sections of different body parts (branches,trunk,root)
Three-self Patriotic Movement Committee of Protestant Churches in China
Three-Self Patriotic Movement of the Protestant Churches in China
Three Sequences Calendar
three-series criterion
three-series theorem
three shaft testing machine
Three Shu Prefectures
threesider
three-side theatre
three-sigma rule
three signs of asphyxia
three simultaneous system of soil and water conservation
Three Sisters
Three Sketches
three sleeper tamping and stabilizing car
three-sludge
three social forms
Three Songs
Three Songs About Lenin
three source model
Three Sovereigns and Five Emperors
three-sphere theorem
three-spin model
Three squirrels
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