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Boston Gear GB1050A Worm Gear, Plain, 14.5 PA Pressure Angle, 0.500" Bore, 20:1 Ratio, 20 TEETH, RH: Amazon.com: Industrial & Scientific
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Amazon.com: Knox Dual Speaker and Mixer Set–Portable 8” 300 Watt DJ PA System with Wired Microphone & Tripod Stands, 8 Channel Amplifier, Bluetooth, USB, SD, 1/4” Line RCA, XLR Inputs, Ideal for
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Boston Gear G1030 Worm Gear, Spoke, 14.5 PA Pressure Angle, 0.313" Bore, 80:1 Ratio, 80 TEETH, RH: Amazon.com: Industrial & Scientific
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