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天然地面
 天然 地面
gen. open ground
 天然地面
bridg.constr. natural ground surface
eng.geol. natural ground
| 标高
 标高
hydroel.st. altitude; datum mark; elevation
space scalar height; scale height

to phrases
天然地面
bridg.constr. natural ground surface
eng.geol. natural ground
tech. open ground; original ground
天然〔无保护层的〕地面
gen. open ground
天然地面
: 10 phrases in 5 subjects
Earth sciences1
Geophysics1
Hydroelectric power stations1
Mining1
Technology6