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้ณใๆตใใชใๅ ดๅใๅ็ใไธๆๅๆญขใใฆใใไธๅบฆๅ็ใใฆใฟใฆไธใใใ
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D DesignHub
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Coaxial contra-rotating propeller โ New Mechanism - New Innovation ๐ #3ddesign #prototype #cad
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