I'm just guessing, but if there is a diaphragm in there I would suspect it's to allow air pressure to equalize. Perhaps the hole and the slot are above and below the diaphragm.
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Type: Posts; User: Mudderoy; Keyword(s):
Re: I now know what it is. . . . 'fer sure'
I'm just guessing, but if there is a diaphragm in there I would suspect it's to allow air pressure to equalize. Perhaps the hole and the slot are above and below the diaphragm.