SirMctowelie t1_jaf0qff wrote
Reply to comment by APLJaKaT in This new Stanley tape measures is missing a few marks between 24 and 25... by Jay_Ray
Same way you confirm a new torpedo level, put it against 2 others :/
APLJaKaT t1_jaf3o27 wrote
Or turn it end for.end on a given surface. Any deviation of the bubble will be twice the actual error.
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