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
For more detailed information, please see the following:
Names and functions of seal components

jet engine spark plug. On the other hand, a faulty spark plug can lead to misfires, reduced engine performance, and even engine damage.
High Mileage Motor Oil


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