(1) the use of electric tools should be in good insulation.Should be taken in the construction site when using power tools installed leakage protector, safety protection measures such as isolation transformer;

(2) when using the Angle grinder, hand grinder, should wear protective glasses, grinding towards to Mars when no one no one side of the device;

(3) use hand electric drill, should first contact with the workpiece after launch, inclined holes should prevent slippery drill, operation must not remove iron by hand directly;

(4) using grinder should be started, after reaching the normal speed, then contact the workpiece.Grinding wheel guard should be installed in good condition;

(5) using the grinding wheel saw cutting grinding workpiece should be steadier clipped on, in case of sawing up hurt;

(6) using a hammer, the operator should wear safety helmet, wear insulating work shoes, and need to wear masks and glasses.