短語詞組短語rock -fragment sandstone 巖屑砂巖rock fragment content 碎石含量rock fragment analysis 巖屑分析rock fragment strength 巖塊強度rock fragment flow 碎石流foreign rock fragment 外來巖塊rock fragment size 鑛巖塊度newly weathered purple rock fragment 紫色母巖碎屑red fragment rock 紅色碎屑巖 返回 rock fragment