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Two-centered arch
 two centered arch
bridg.constr. 双心拱
 two-centered arch
hydroel.st. 双心拱
| dam
 dam
anim.husb. 母畜
environ. 水坝
hydroel.st.
tech. 水坝
water.res. 大坝; 水闸; 水库
| with
 with
gen.
| variable-thickness arches
 variable-thickness arches
hydroel.st. 变厚度拱
at a | nonsymmetrical
 nonsymmetrical
gen. 不 对称的
| canyon
 canyon
environ. 峡谷

to phrases
two-centered arch
hydroel.st. 双心拱
tech. 二心拱
two centered arch
bridg.constr. 双心拱
Two-centered arch: 2 phrases in 1 subject
Hydroelectric power stations2