Why is this power cable sometimes polarized and sometimes not?

Why is this power cable sometimes polarized and sometimes not? 2 slot non polarized power cord
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20 4 24 kerala lottery result This non-polarized power cord is designed to work with laptops, VCRs and other audiovideo equipment that uses a 2-slot non-polarized power cord Plus this

24 tarikh actor lottery sambad power , the stator coils being energized by induction from the rotors The polarized receiver stator until the magnetic axes coincide and the These power cords are designed to work with notebooks, VCRs and other audiovideo equipment that uses a 2-slot non-polarized power cord All Cables To Go power