This being possibly totally irrelevant I still thought it was cool. On Dirty Jobs Mike was cleaning a boiler on a yacht that was built in 1904 (the year my Dad was born). Anyway, the lining for the opening was made of brick - basically a brick tunnel forming the collar between the combustion chamber and the hatch.
Well, I thought it was cool... ~shrug~
Well, I thought it was cool... ~shrug~
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