Hermetic sealing keeps any type of material from leaking out of a container. Many industries use a hermetic connector to insulate and channel electricity through a vacuum feedthrough and is able to withstand high pressure and harsh environments. A hermetically sealed connector can be used in aerospace,
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by Walter D. Wood & Wendell L. Wood Mechanical Engineering – March 1990 Since World War II, high-performance electrical bulkheads have been sealed by surrounding low-expansion alloy metal pins in a glass or ceramic-filled metal housing. Both glass and ceramic seals offer extremely low leak rates over
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