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2. Glass-to-metal seal - Wikipedia

   en.wikipedia.org/wiki/Glass-to-metal_seal

   Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...

3. Revere Ware - Wikipedia

   en.wikipedia.org/wiki/Revere_Ware

   Lid Diameters can also lend to confusion, as the correct stainless steel lids of vintage (pre-Corning) Revere Ware have belled lips. These belled lips facilitate the oft-advertised Vapor Seal, a method of locking in moisture, which some believe retain nutrients. Re-sellers and collectors, when measuring the inner circumference of the bell ...

4. Plug door - Wikipedia

   en.wikipedia.org/wiki/Plug_door

   A plug door is a door designed to seal itself by taking advantage of pressure difference on its two sides and is typically used on aircraft with cabin pressurization. The higher pressure on one side forces the usually wedge -shaped door into its socket to create a seal, which prevents it from being opened until the pressure is equalised on both ...

5. Thermal expansion valve - Wikipedia

   en.wikipedia.org/wiki/Thermal_expansion_valve

   A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible.A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator.