A.1800mm(長)×2200mm(寬) B.2000mm(長)×2400mm(寬) C.1200mm(長)×2400mm(寬) D.1200mm(長)×3400mm(寬)
A.堅硬巖層地段 B.Ⅱ-Ⅲ類圍巖 C.一般土質(zhì)圍巖地段 D.松軟地層
A.潔凈水,pH值應(yīng)大于4 B.自來水,pH值應(yīng)大于4 C.潔凈水,pH值應(yīng)小于4 D.自來水,pH值應(yīng)小于4