The socket sleeve assembly should be flexible enough to ensure that there is sufficient contact pressure on the plug pins. The sleeve should be corrosion and wear-resistant to ensure good contact between the plug and socket mating parts; the plug latch should be locked and can not be rotated, otherwise it will affect the insertion performance and produce unsafe factors; the converter has a cord fixing device to ensure Cord fixed, able to withstand the normal tension and torsion, etc .; plug and socket mating, mating surface should be between the basic strict to prevent accidents caused by electric shock.
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