短語詞組短語fine filling gravel 細(xì)礫石fine gravel aggregate 細(xì)礫骨料low fine gravel 細(xì)砂含量低的礫石fine gravel soil 細(xì)粒土gravel fine 細(xì)礫fine surface mulch of gravel 細(xì)礫薄表層 返回 fine gravel