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倒拱
gen. counter-vault
archit. counter vault
bridg.constr. reversed arch; inverse-arch
hydroel.st. inverted arch; invert
met. invert arch
tech. arch invert
倒〔反,底〕拱
construct. inverted arch
倒〔仰〕 拱
construct. arch invert
倒拱: 30 phrases in 6 subjects
Architecture3
Bridge construction1
Engineering geology1
Metallurgy1
Oil / petroleum1
Technology23