The suction wants to pull air into the hole, not expel anything out of it. Dust won’t come out of the hole at all.
God, that’s so obvious. Ta :)
Ha, it's easy to say when you've seen it in the flesh that's all.
@Howard started
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The suction wants to pull air into the hole, not expel anything out of it. Dust won’t come out of the hole at all.