Axial flow valve - Wikipedia
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Fichier:Thayer valve.jpg — Wikipédia
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Instrument Innovations Bass Trombone Patented Axial Flow Valve
Axial flow valve - Wikipedia
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Trombone Valves – Edwards Instrument Co.
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![Jupiter XO Professional Bb/F Trombone [Thayer Valve] - INSTANT REBATE SHOWN IN CART (PLUS GIFT CARD FOR SAME VALUE INCLUDED), Professional Trombones: Pro Winds](https://s3.amazonaws.com/cdn.prowinds.com/images/uploads/844_1129_popup.jpg "Jupiter XO Professional Bb/F Trombone [Thayer Valve] - INSTANT REBATE SHOWN IN CART (PLUS GIFT CARD FOR SAME VALUE INCLUDED), Professional Trombones: Pro Winds")