segmental arch culvert弓形: segment of a circle bow-shap ...洞: hole; cavity弓形拱: segment arch; segmental arch; spring arch弓形拱涵: segmental arch culvert弓形拱系统: segmental arch system下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:弓形拱洞，即可在微信中查询翻译
