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the first suggests retention to me but we both agree that this does not happen. the laser is a good example of "external work". CO2 is nice as it retains nothing (little or no loss of energy) and something else directs and concentrates.
the first suggests retention to me but we both agree that this does not happen.
the laser is a good example of "external work". CO2 is nice as it retains nothing (little or no loss of energy) and something else directs and concentrates.
