短語詞組短語sandy gravel layer 砂卵石層sandy gravel site 砂礫石場(chǎng)地sandy gravel excavation 砂卵石基坑sandy gravel materials 砂礫石料cement -sandy gravel 水泥砂礫石tight sandy gravel 致密砂礫巖sandy gravel soils 砂礫石土super thick sandy gravel 超厚砂卵石層diluvial sandy gravel 洪積砂礫 返回 sandy gravel