9. Headphones, Diving Regulators, Reflector Light Bulbs
Aired Nov 20, 200921 minTMDb
Miniature speaker drivers, wiring and cushioned housings are assembled into headphones. Precision valves, diaphragms and seals are combined and pressure-tested to create diving regulators, while reflector bulbs are formed, coated and fitted with their electrical components to concentrate light into a controlled beam.
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