Sandaa桑多sandn.沙；沙子；沙滩；黄灰色vt.撒沙；打磨；以沙掩盖sand blended with clay含黏砂土sand body distribution砂体分布sand soil degree index土地沙化程度指数sand soil liquefaction砂土液化Sand lined die casting覆砂金属型铸造sand irrigation method灌砂法sand-washing machine洗砂机Sand storage treatment沙藏处理sand accumulation line积沙线sand-desertification沙漠化