短語詞組短語heavy placer mineral anomaly 重砂異常heavy sand mineral 重砂礦物heavy -mineral dispersion flow 重礦物分散流heavy mineral distribution 重礦物分布heavy mineral prospecting 重礦物勘探heavy mineral anomalies 重砂異常heavy mineral characteristics 重礦物特征heavy mineral map 重礦物圖 返回 heavy mineral