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K4ICY's Homebrew Pneumatic Antenna Launcher
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TENNIS BALL CANNON : 11 Steps - Instructables
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The Spudgun Technology Center - Details for the 2.5" SCH 40 Tennis Ball Barrels
K4ICY's Homebrew Pneumatic Antenna Launcher
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26 Best Tennis ball cannon ideas | tennis ball cannon, cannon, tennis ball
QE19 Pneumatic Antenna Launcher
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DIY: Rubber Band-Powered Tennis Ball Launcher
Pneumatic Antenna Launchers
