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Moreover, the philosophy behind universal spark plug wires reflects the essence of universality itself—the notion that certain truths and functionalities are common across all domains

A patent for an oil seal was filed by Nelson Thomas Edward on August 12, 1937, and published a year later. There were two purposes described. The device was to provide an oil seal between a fixed housing and a rotating part. The seal is described as

 

2. Metal Case

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Oil seal materials