Under the surface of some lines, that appear near some crop circles, possible exist some pipes or drainage, also possible electric power lines or underground gas lines.
Chini ya uso wa baadhi ya mistari, kwamba kuonekana karibu na mzunguko wa baadhi ya mazao, inawezekana kuwepo mabomba au baadhi ya mifereji ya maji, pia inawezekana mistari ya umeme au mistari ya chini ya ardhi gesi.