Deep Ⅱ° deep burns

deep concave mining

Deep Slope

MICROSCALE DEEP CONCAVE TERRAIN

Concave Slope

concave slope in open pit

concave-concave

convexo-concave slope

Deep and Ultra-deep Water

DEEP AND ULTRA-DEEP WELL

deep yellow deep

earlier deep plough and deep fertilization

concave downward‘ concave down

concave-up concave-down

plane-concave lens (=plano-concave lens)

Slope Analysis of the Slope

slope in slope

slope-ridge and slope-valley

deep tour mode