片语
arch crown cantilever method拱冠梁法
advance arch-crown strengthening拱顶超前加固
underground powerhouse arch-crown地下厂房顶拱
Arch crown subsidence拱顶下沉
arch crown settlement拱顶沉降
arch crown block拱顶石
arch crown concrete拱顶混凝土
arch crown beam profile拱冠梁剖面
cracks of arch crown顶拱裂缝
arch apex拱顶石;拱顶