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a bulls-eye level

a dead level

a level head

a falling gradient

a gradation

a strata layer called "Chichibu" paleozoic strata

a steep grade

a degree of a slope

a grade of hardening

a wage level

a scale of earthquake intensity

a pressure point

an outcrop of a stratum

a voltage peak

a degree of ionization

lower a rating

a moor of low altitude

a stratum called a Mesozoic formation

a high tension

stratum called alluvium

a sediment called continental sediment

horizontally level

a layer of the earth's crust, called Mesozoic

a geological fault

the surface layer of soil

social mobility

a bowl-shaped geological formation at the top of a volcano

a stratum called a sea layer

a permeable layer

a stratum composed of the sediment from brackish water