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five-centered
 five-centered
gen. 五心的
| arch
 arch
geol. 背斜
hydroel.st.
met. 拱顶; 炉拱
oil 穹隆; 鞍状构造
space ; 半圆形; 拱形物

to phrases
five-centered
gen. 五心的
five-centered: 2 phrases in 2 subjects
Architecture1
Bridge construction1