DD201 type single-phase watt-hour meter is the abroad advanced technology, the careful design and manufacture of a new generation of single-phase and long life technology, used for measuring and watt-hour than frequency for 50 Hz ac meritorious electric

DD201 type single-phase watt-hour meter is the abroad advanced technology, the careful design and manufacture of a new generation of single-phase and long life technology, used for measuring and watt-hour than frequency for 50 Hz ac meritorious electric power communication…….