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Elderly people, plug plug, to prevent electric shock, very careful. When unplugging the power cord, do not hold the plug. Use the method of pulling the power cord. Pull the power cord vigorously. Pulled off the

1, mechanical life should not be less than 5000 times. 2. Electrical life: when rated load is added, it shall be no less than 1000 times. 3. In the mechanical life test, apply 2 times the setting power to the relay to make it operate, and 0.7 times the setting...

The minimum electric current that can be felt by people is called the sensing current. The ac value is 1mA and the dc value is 5mA. The maximum current that a person can get rid of after being electrocuted is called the escape current. The ac current is 10mA, ...