Note the use of equipment press machine
When using the instruments will often pay no attention to the trivial, press machinesome may cause serious consequences, so we in the use of equipment, must do the following 4:00.

(L) electronic device's power cord, plug should be intact.
(2) to test high-pressure part of the parts, special attention should be physical and high-voltage insulation, preferably with one hand operation, and he stood on board insulation to reduce the risk of electric shock. Such as electric shock in case of accidents, should be immediately cut off the total power supply, and first aid.
(3) experiments to have,press machine brand phenomenon, it is necessary to immediately cut off the power supply, and check the circuit troubleshooting.
(4) finished the experiment should be to cut off power to prevent the accident.