natural sandy gravel replacement
cement-stabilized natural gravel
cement-stsbilized sandy gravel
concrete face sandy gravel-fill dam
liquefaction of deep-level sandy sandy soil
SANDY GRAVEL
砂砾岩
砂砾石
砂卵(砾)石
砂砾石层
卵石层
砂卵石
砂卵砾石
砂质砾石
sandy gravel overburden layer
super thick sandy gravel
water-rich sandy gravel strata
natural draught natural draft
Sandy hill and sandy land