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No, CFM is Cubic Feet per Minute. So simply refers to how long the pump will take to move a given volume of air. For vacuum bagging small parts, this is the difference between your pump taking 2p seconds to pull vacuum on a bag or 2 minutes to pull full vacuum - it's not worth worrying about. When you get up to making boats in a production environment, then you might not want to wait 20 minutes to pull full vacuum and it's worth getting a bigger pump.
All you are worried about is maximum vacuum; and yes, 0.3 Pascal is super high vacuum - so high that it makes me suspicious...
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