According to the different characteristics of the light should be used lamp holders such as steel, aluminum, brass, ceramic and plastic materials, and pins of the socket of the lamp cap steel or brass, the electrical contact pads and the pins of brass or the performance of the same material should be usedmanufacturing. The insulator metal lamp glass, ceramic, bakelite, phenolic folder cloth laminates and high temperature resistant plastic and other materials should be used.The plastic lamp should adopt high temperature, flame retardant engineering plastics manufacturing.
Steel housing surface of the lamp holder cap should coating, the average thickness of the galvanization layer is not less than 6μm. The steel shell should be subjected to surface treatment can also be a chromium-plated or nickel plating average thickness of not less than 3 μm.
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