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• The fire triangle

• Electric shock

• Movement of atoms and electrons

• Simple alternator

• Simple dynamo

• The first magnetism

• Magnetic fields

• MI cable

• Examples of good and bad posture

• Correct manual lifting procedure

• Correct procedure

• Force conductor

• Metal joining

• Screw fixing

• Expansion bolt

• Spring toggle

• Current movement in electric fencing

• Digital pulses

• Output waveforms