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Dave Thomas | all galleries >> Out and About in Southeastern PA >> Bethlehem >> NMIH - Bethlehem >> NMIH Run Day > Boiler Scale
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10-Dec-2023

Boiler Scale

Some examples of the build-up
that can occur in boiler tubes.

Apple iPhone 13 Pro
(iP13035) 1/120s f/1.5 at 5.7mm iso64 full exif

other sizes: small medium original auto