unobstructed crest of spillway的意思|示意
美 / /
英 / /
溢洪道顶部通畅
unobstructed crest of spillway的网络常见释义
无闸堰顶 ... unobstructed construction 无障碍结构 unobstructed crest of spillway 无闸堰顶 unobstructed sight 无阻视线 ...