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to phrases
three-centered arch
archit. 三中心拱
bridg.constr. 三心拱
expl. 三心拱顶部由三段圆弧构成的拱碹
tech. 三心椭圆拱; 三心平圆拱【建】; 三中心拱
three-centered arch: 4 phrases in 2 subjects
Hydroelectric power stations1
Technology3

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