Any type of detector or metal detector or ground handy radar or mine detector or GPR or ground-penetrating radar or image metal detector with scanner or antenna metal detector (the same as a long range [...]
Non useful noise or interference in the main work scene is a normal thing that arises from minerals and rocks or changes in the earth's layers and the method of detecting points with such non [...]
Every type of metal or source or body or materials and mineral materials and resources has its own field conditions formed by energy, heat and radiation or its own frequency, which forms the same conditions [...]