ext_163337 ([identity profile] theoctothorpe.livejournal.com) wrote in [personal profile] octothorpe 2011-05-07 07:13 pm (UTC)

Good to know!

It's doubly difficult to apply the penetrant (lulz… penetrant) to the surface that needs it, as the rim is in the way on one side, and the disc is in the way on the other.

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