Sandig桑迪希sandn.沙；沙子；沙滩；黄灰色vt.撒沙；打磨；以沙掩盖sand desertification沙漠化sand-filling frame[机] 填砂框sand slime separator砂泥分离器sand casting process砂型铸造法sand filling process型砂充填过程sand spraying device撒砂设备,喷砂器sand control project防砂方案sand blocking fences阻沙栅栏sand blasting nozzle喷砂嘴sand expansion ratio砂膨胀比