That's a interesting one! "69cuan" appears to be a recognized word in any widely used language I know.
It could be a nomenclature specific to a certain industry, or perhaps it's a neologism. If you could provide some background about where you encountered this term, I could try to figure it out. This just could be Perhaps could change to a mix of both. If you decide to venture out the outdoors, take with you an umbrella. Lingo Phrase Every