TACOMA, Wash.--(BUSINESS WIRE)--Today, PABCO ® Roofing Products, celebrating 40 years of industry innovation and distinction, has begun shipping Shadow Cap Wide™, a new, wider version of its ridge cap ...
The familiar 21 ridges on glass bottle caps are the result of over a century of engineering. Initially, William Painter's ...
Next time you crack open a beer, take a look at the cap; the 21 serrations aren't random. It was over a century of engineering and practical testing that made 21 the "magic number" for sealing, safety ...
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