When you "wave" good bye to someone... shake your hand quickly. Enjoy the cool "draft" that comes off of your hand. That must be its "working principle".
How could you possibily expect anyone to provide any intelligent comment based on what you have posted.
You want a real answer from someone on this forum, how about asking a "real" question?
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Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".
wave draft 
Re: wave draft
