Many, many years ago, they used to throw rifle scopes into warm water, and if they saw bubbles that resulted in a verdict of "Not sealed well".
I can't remember how they defined and standardized "warm" but they did have some kind of defined temperature for the water.
135 F would be a guess dredged up from deep within an old and faulty memory.
I can't remember how they defined and standardized "warm" but they did have some kind of defined temperature for the water.
135 F would be a guess dredged up from deep within an old and faulty memory.
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