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Copyright © 2023 offset printing All Rights Reserved please keep the copyright link for copying! change another one2factory | switcher-1097491factory | commonly used power supplies1026544report | join for free5985factory | printing and processing5694report | cooperate with school25664factory | communication,24583people commercial companiesin the power supply system, the protection of indirect lightning and direct lightning influence or other instantaneous overvoltage surges is applicable to the requirements of surge protection in the family, the tertiary industry and industrial fields.