短語詞組短語Clear r Span 淨(jìng)跨距;淨(jìng)跨Clear -span facility 淨(jìng)跨距設(shè)施small clear -span tunnel 小淨(jìng)距隧道clear span building 單跨建築物Span clear 淨(jìng)跨 返回 clear span