Will the fuse in the dual power conversion switch break when a short-circuit fuse occurs? What will happen if it is broken? The insurance in the double-turn switch only protects the control system of the switch,It doesn't matter with the main circuit. short circuit will lead to large current in the circuit,The fuse will exceed the rated current,Cause the fuse to fuse,

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Electric sewing machine is used as the production and use of fixed assets in the factory. what is the depreciation period? Your unit's main business is sewing clothes,The sewing machine has to be depreciated for not less than 10 years,Otherwise,Not less than 5 years.\ R the former belongs to the machine production equipment (directly producing products ),The latter belongs to the tools related to production and operation (the equipment of the welfare department,Not directly producing products ).