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Old 2014-02-27, 8:24am
LarryC LarryC is offline
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Join Date: Mar 07, 2011
Location: Northern California
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Under the right conditions small funnels can be made to work quite effectively. Welding shops use portable ventilation systems using funnels effectively and they are available commercially. Both have limitations and advantages. Just because its published in a magazine doesnt mean its well researched.
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