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水力坡降
bridg.constr.	hydraulic drop; hydraulic slope; hydraulic gradient
hydroel.st.	hydraulic grade; hydraulical grade; hydraulic gradient slope; hydraulical gradient slope
oil	hydraulic pressure gradient
tech.	slope of hydraulic grade line
水力面坡降
archit.	hydraulic inclination
水力坡降梯度
archit.	hydraulic gradient
水力坡降线
construct.	hydraulic grade

水力坡降: 15 phrases in 4 subjects

Engineering geology	1
Hydroelectric power stations	8
Oil / petroleum	1
Technology	5