海滨砂矿 beach placer ; [矿业] sea beach placer

海湖滨砂 beach or lake sand

海滨漂砂矿床 beach placer

低平砂质海滨 flat sandy shore

海滨砂矿开采 beach placer mining

海滨砂矿开发 beach placer exploitation

海滨砂矿勘探 beach placer exploration

闽南滨海砂地 coastal sandy land in south of fujian