Looks like JBD, Bj, electure have you covered on the differences. I will add that if you are going to use the latching type, and control it with a PE cell, or time clock, then, you will need to get a "two wire control module". Otherwise, it won't work correctly. Don't ask me how I know. By the way, when I was in the Navy, a JBD was a Jet Blast Deflector. JBD, do you resemble that, or am I mistaken?
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