How to distinguish between power cables and electrical wiring on drawings
Cable ends should be marked with cable head symbols, the middle line should also be different from the ordinary wiring. Bv at the beginning of the general wire, with YJV or vv is generally a cable, but not limited to these
Put a piece of paper in the dog's urine, whenever the dog to think about urine when the dog's nose smell, put the paper in the designated place, more training a few dogs will be.
Especially the external hard disk box, when used very prone to this situation
