Similar imprints - stamps often arise just above the underground lines, mostly drains, sewers, water pipes, but it may be of any utility lines.
Sawa imprints - mihuri Mara nyingi Ondoka tu juu ya mistari ya chini ya ardhi, hasa Machafu, mabomba ya maji machafu, mabomba ya maji, lakini inaweza kuwa ya mistari zozote za matumizi.