Generally, the chemical or physical action of these materials with sand will make loose sand stick each other and form a protective layer for windbreak and sand fixation. 一般是通過(guò)與沙粒發(fā)生化學(xué)或物理化學(xué)作用等,使松散的沙粒粘結成整體,形成保護層而達到防風(fēng)固沙,治理沙害的不同效果。