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Why won't my brand new lego pneumatic pump activate the pneumatic cylinder? Did I do something wrong? : r/lego
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LEGO Pneumatic Pump (Old Style) 48mm with Black Piston (4 Studs Long) and Spring (4701) | Brick Owl - LEGO Marketplace
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Amazon.com: Habow 19Pcs Pneumatic-Technic-Parts Kit Compatible with Lego- Pneumatic Cylinders-Air-Pump Pressure Rod Switch Piston Hose Technic Linear Actuator MOC-Replacement-Parts. : Industrial & Scientific
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