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汽輪機排汽消聲器是建立在通孔菱形阻聲流原理上制造，消聲進口管孔為通孔型，以穿孔板為阻性聲片，阻聲片為聲流式結構，是利用菱形彎曲吸聲及通道吸聲層厚度變化來改善消聲性能，不僅消聲較高，適應頻帶寬，氣流阻力小，能保證消聲效果又保證汽輪機背壓不增高。
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