A.危險(xiǎn)化學(xué)品倉(cāng)庫(kù) B.堆料場(chǎng) C.生產(chǎn)區(qū)倉(cāng)庫(kù) D.混凝土、砂石料
A.2m B.2.5m C.3m D.5m
A.3 B.4 C.5 D.6