溝 - gutter, ditch, sewer

ditch; drain; gutter; trench

oceanic trench; deep-sea trench; deep

ditch; drain; gutter; trench

drainage; gutter; ditch

channel (type of section steel)

trench digging machine; trencher

Chinese pond mussel (Sinanodonta woodiana)

ditch; sewer; canal

furrow ridges

ditch water

groove in the body of wooden plane which holds the blade

epidermal depression; skin depression