A.植物防護(hù)B.坡面處治C.護(hù)坡及護(hù)面墻D.拋石防護(hù)
A.5mB.20mC.30mD.50m
A.封面防護(hù)B.網(wǎng)格防護(hù)C.護(hù)面墻D.砌石防護(hù)