This is the tendency for water to pass through a membrane separating a weak solution from a strong one. 渗透是一种水通过膜的运动趋势，膜的两面分别是浓溶液和稀溶液。
The penetration law of a solution of calcium chloride,water glass and sodium succinate into dust is determined by the forward permeability test. 采用正向渗透试验方法测定了氯化钙和水玻璃溶液添加丁二酸钠后溶液在粉尘介质中的渗透规律。
