Sandig桑迪希sandn.沙；沙子；沙滩；黄灰色vt.撒沙；打磨；以沙掩盖sand control methods防砂技术Sand TableSimulation沙盘模拟Sandra Pires Tavares皮雷斯·塔瓦雷斯sand system scrubber砂系洗涤器sand-gravel filter砂砾过滤机sand covered by soil土包砂sand/mud interbed砂泥岩互层sand fixation forest固沙林sand sieving machine筛砂机sand floating system砂培漂浮育苗