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* [https://youtube.com/watch?v=I9m2w4DgeVk Transmission lines] | * [https://youtube.com/watch?v=I9m2w4DgeVk Transmission lines] | ||
* [https://youtube.com/watch?v=RpB5JqGo1co Ceramic strip soldering techniques] | * [https://youtube.com/watch?v=RpB5JqGo1co Ceramic strip soldering techniques] | ||
* [https://youtube.com/watch?v=q5dhfhMItQc A Precision CRT (1955)] | |||
==Promotional films== | ==Promotional films== |